Tubuli hi-res stock photography and images

Penny bun or cep mushrooms (Boletus edulis), Val Sarentino, Bolzano, Trentino-Alto Adige, Italy Stock Photo

RMR25JJB–Penny bun or cep mushrooms (Boletus edulis), Val Sarentino, Bolzano, Trentino-Alto Adige, Italy

RM2T8MWAM–Verdes - tubuli thermes.

A variety of shells, including heart shells, tubuli and balani. Etching by I. Taylor. Stock Photo

RM2H435Y8–A variety of shells, including heart shells, tubuli and balani. Etching by I. Taylor.

Tubulis for the construction of vaults ( 3rd - 4th CE ) Roman era from Complutum ALCALA DE HENARES Madrid SPAIN Stock Photo

RMBY5H67–Tubulis for the construction of vaults ( 3rd - 4th CE ) Roman era from Complutum ALCALA DE HENARES Madrid SPAIN

Principles and practice of operative dentistry . Fig. 288.—Transverse section of human dentin, showing pipe-stem appearance of infected dentinaltubules. (Tomes.). Fig. 289.—Transverse section of dentinal tubules. (V. A. Latham.) X 162.5. The dark tubules show-infection with micro-organisms and the pipe-stem appearance described by Tomes. DENTAL CARIES. 159 while others will seem to be only slightly affected. Walkhoff declares thedentinal tubuli are regularly enlarged, and that the varicosities appearingat irregular intervals are occasioned by the drying of the specimen. Upon further examinatio Stock Photo

RM2ANE0WP–Principles and practice of operative dentistry . Fig. 288.—Transverse section of human dentin, showing pipe-stem appearance of infected dentinaltubules. (Tomes.). Fig. 289.—Transverse section of dentinal tubules. (V. A. Latham.) X 162.5. The dark tubules show-infection with micro-organisms and the pipe-stem appearance described by Tomes. DENTAL CARIES. 159 while others will seem to be only slightly affected. Walkhoff declares thedentinal tubuli are regularly enlarged, and that the varicosities appearingat irregular intervals are occasioned by the drying of the specimen. Upon further examinatio

RMCRYP7F–DENTIN, SEM

Arched flue of tiles conveying hot air from an external charcoal furnace into the commander's bath suite at Chesters Roman fort, Hadrian's Wall, UK. Stock Photo

RM2R19F7C–Arched flue of tiles conveying hot air from an external charcoal furnace into the commander's bath suite at Chesters Roman fort, Hadrian's Wall, UK.

RMCRYMX2–DENTIN, SEM

. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 570 ANATOMY OF VERTEBRATES. 380 pass, by being disposed in convolutions upon the edge of the ' mesorchium.' The primitive spermatic cells, which are per- sistent in the Cyclostomes, have coalesced into tubes (tubuli seminiferi) in Osseous Fishes; the tubes open at one end in the wide and sometimes saccular commencement of the vas deferens, and terminate at the other, either by blind free extremities or by reticulate anastomoses.' In the Herring, Shad, and other Clupeoids, the secerning tubes ramify and anastomose in the Stock Photo

RMPG1R3K–. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 570 ANATOMY OF VERTEBRATES. 380 pass, by being disposed in convolutions upon the edge of the ' mesorchium.' The primitive spermatic cells, which are per- sistent in the Cyclostomes, have coalesced into tubes (tubuli seminiferi) in Osseous Fishes; the tubes open at one end in the wide and sometimes saccular commencement of the vas deferens, and terminate at the other, either by blind free extremities or by reticulate anastomoses.' In the Herring, Shad, and other Clupeoids, the secerning tubes ramify and anastomose in the

. FlG. 123—Purulent Periorchitis ( Empyema of Scrotum) with Necrosis and Atrophy of Testes. /, Vestige of testis sectioned, showing n the right remnant of paren- chyma ; j, epididymis ; , vas deferens : ./, scrotal wall turned hack. On the right f the right-hand figure the broad white streak between 2 and ./ i-> a deep incision made to keep specimen open: the sperm heads. If spermatozoa are abundant but all dead, the tubuli seminiferi must be comparatively sound and death has occurred somewhere in the excretory appara- motility, the frequency of the separation of heads and bodies, and the Stock Photo

RMMCK916–. FlG. 123—Purulent Periorchitis ( Empyema of Scrotum) with Necrosis and Atrophy of Testes. /, Vestige of testis sectioned, showing n the right remnant of paren- chyma ; j, epididymis ; , vas deferens : ./, scrotal wall turned hack. On the right f the right-hand figure the broad white streak between 2 and ./ i-> a deep incision made to keep specimen open: the sperm heads. If spermatozoa are abundant but all dead, the tubuli seminiferi must be comparatively sound and death has occurred somewhere in the excretory appara- motility, the frequency of the separation of heads and bodies, and the

RMR25JJK–Penny bun or cep mushrooms (Boletus edulis), Val Sarentino, Bolzano, Trentino-Alto Adige, Italy

Archive image from page 193 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 T7ie lobes attached to the mediastinum, but artificially separated from each other. (From a preparation in the Hunterian Museum, formerly in Sir A, Cooper's collection.) not entirely distinct, but communicate with neighbouring lobes : the processes investing them are therefore incomplete, and the lobes cannot be separated from each other without division of some of the seminiferous tubuli. Krause estimates the number of the lobes as varying from 404 to 484. Stock Photo

RMW240BT–Archive image from page 193 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 T7ie lobes attached to the mediastinum, but artificially separated from each other. (From a preparation in the Hunterian Museum, formerly in Sir A, Cooper's collection.) not entirely distinct, but communicate with neighbouring lobes : the processes investing them are therefore incomplete, and the lobes cannot be separated from each other without division of some of the seminiferous tubuli. Krause estimates the number of the lobes as varying from 404 to 484.

Principles and practice of operative dentistry . Normal dentin showing tubuli in longitudinal section. (F. B. Noyes.) Highly mag-pified. Dentinal tubulientering theenamel If Dentin Stock Photo

RM2AKW2EH–Principles and practice of operative dentistry . Normal dentin showing tubuli in longitudinal section. (F. B. Noyes.) Highly mag-pified. Dentinal tubulientering theenamel If Dentin

RMCRYMWW–DENTIN, SEM

. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. T7ie lobes attached to the mediastinum, but artificially separated from each other. (From a preparation in the Hunterian Museum, formerly in Sir A, Cooper's collection.) not entirely distinct, but communicate with neighbouring lobes : the processes investing them are therefore incomplete, and the lobes cannot be separated from each other without division of some of the seminiferous tubuli. Krause estimates the number of the lobes as varying from 404 to 484.* The tubuli are of a white colour and uniform size, but their ca Stock Photo

RMPFN4B5–. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. T7ie lobes attached to the mediastinum, but artificially separated from each other. (From a preparation in the Hunterian Museum, formerly in Sir A, Cooper's collection.) not entirely distinct, but communicate with neighbouring lobes : the processes investing them are therefore incomplete, and the lobes cannot be separated from each other without division of some of the seminiferous tubuli. Krause estimates the number of the lobes as varying from 404 to 484.* The tubuli are of a white colour and uniform size, but their ca

RMCRYKBH–DENTIN, SEM

. Fig. 123—Purulent Periorchitis (Empyema of Scrotum) with Necrosis and Atrophy of Testes. /, Vestige of testis sectioned, showing ou the right remnant of paren- chyma ; 2, epididj'inis ; j, vas deferens ; 4, scrotal wall turned back. On the right of the right-hand figure the broad white streak between 2 and 4 is a deep incision made to keep specimen open. the sperm heads. If spermatozoa are abundant but all dead, the tubuli seminiferi must be comparatively sounds and death has occurred somewhere in the excretory appara- motility, the frequency of the separation of heads and bodies, and the st Stock Photo

RMMCK84R–. Fig. 123—Purulent Periorchitis (Empyema of Scrotum) with Necrosis and Atrophy of Testes. /, Vestige of testis sectioned, showing ou the right remnant of paren- chyma ; 2, epididj'inis ; j, vas deferens ; 4, scrotal wall turned back. On the right of the right-hand figure the broad white streak between 2 and 4 is a deep incision made to keep specimen open. the sperm heads. If spermatozoa are abundant but all dead, the tubuli seminiferi must be comparatively sounds and death has occurred somewhere in the excretory appara- motility, the frequency of the separation of heads and bodies, and the st

Archive image from page 162 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 FiG. 31. AcervuUne Variety of Eozoon, St. Pierre. (7.) General form, half natural size. (&.) Portion of cellular interior, magnified, showing the course of the tubuli. tinct species, it would be difficult to determine. In the meantime I have described it as a variety, '' acervu- liiia/' of the species Eozoon Canadense. Another variety also, from Petite Nat Stock Photo

RMW23G76–Archive image from page 162 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 FiG. 31. AcervuUne Variety of Eozoon, St. Pierre. (7.) General form, half natural size. (&.) Portion of cellular interior, magnified, showing the course of the tubuli. tinct species, it would be difficult to determine. In the meantime I have described it as a variety, '' acervu- liiia/' of the species Eozoon Canadense. Another variety also, from Petite Nat

Principles and practice of operative dentistry . Normal dentin showing tubuli in longitudinal section. (F. B. Noyes.) Highly magnified. Dentinal tubuli IMentering th<ename. Stock Photo

RM2ANG1CN–Principles and practice of operative dentistry . Normal dentin showing tubuli in longitudinal section. (F. B. Noyes.) Highly magnified. Dentinal tubuli IMentering th<ename.

. Fossil plants : for students of botany and geology . Paleobotany. 124 THALLOPHYTA. [CH. tubular structure in calcareous nodules obtained from a rock of Ordovician age in the Girvan district of Scotland. These Authors considered the tubes to be those of some Khizopod, and proposed to designate the fossil Girvanella. Ginanella (fig. 26). Messrs Nicholson and Etheridge defined the genus as follows:— "Microscopic tubuli, with arenaceous or calcareous (?) walls, flexuous or contorted, circular in section, forming loosely compacted masses. The tubes, apparently simple cylinders, without perfo Stock Photo

RMPG1727–. Fossil plants : for students of botany and geology . Paleobotany. 124 THALLOPHYTA. [CH. tubular structure in calcareous nodules obtained from a rock of Ordovician age in the Girvan district of Scotland. These Authors considered the tubes to be those of some Khizopod, and proposed to designate the fossil Girvanella. Ginanella (fig. 26). Messrs Nicholson and Etheridge defined the genus as follows:— "Microscopic tubuli, with arenaceous or calcareous (?) walls, flexuous or contorted, circular in section, forming loosely compacted masses. The tubes, apparently simple cylinders, without perfo

RMCRYKBF–DENTIN, SEM

. Fig. 123—Purulent Periorchitis ( Knipvenia of Scroluin) with Necrosis and Atrophy of Testes. I Vestige of testis sectioned, showiii.',' on the ri.uht remnant of paren- chyma ; 2, epididymis ; ?, vas deferens ; 4. scrotal wall turned back. On the right of the right-hand fignre the broad white streak between 2 and .; is a deep inci.sion made to keep specimen open. the sperm heads. If spermatozoa are abundant but all dead, the tubuli seminiferi must be comparatively sound and death has occurred somewhere in the excretory appara- motility, the frequency of the separation of heads and bodies, and Stock Photo

RMMCK8J0–. Fig. 123—Purulent Periorchitis ( Knipvenia of Scroluin) with Necrosis and Atrophy of Testes. I Vestige of testis sectioned, showiii.',' on the ri.uht remnant of paren- chyma ; 2, epididymis ; ?, vas deferens ; 4. scrotal wall turned back. On the right of the right-hand fignre the broad white streak between 2 and .; is a deep inci.sion made to keep specimen open. the sperm heads. If spermatozoa are abundant but all dead, the tubuli seminiferi must be comparatively sound and death has occurred somewhere in the excretory appara- motility, the frequency of the separation of heads and bodies, and

Archive image from page 96 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 WHAT IS EOZOON tendency to form a supplemental or intermediate skele- ton with canals though the canals themselves in their arrangement more nearly resemble Calcarina, which Fig. 19. Section of a Nummulite, from Eocene Limestone of Syiia. Showing chambers, tubuli, and canals. Compare this and fig. 20 with figs. 10 and 11. Stock Photo

RMW1T7BW–Archive image from page 96 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 WHAT IS EOZOON tendency to form a supplemental or intermediate skele- ton with canals though the canals themselves in their arrangement more nearly resemble Calcarina, which Fig. 19. Section of a Nummulite, from Eocene Limestone of Syiia. Showing chambers, tubuli, and canals. Compare this and fig. 20 with figs. 10 and 11.

An atlas of human anatomy for students and physicians . -;3, Convoluted tubules ,>} Tubuli renalcs contorti -- ^Malpighian corpuscles ^ (.<.ir[uiscula renis (Malpighii) Interlobular or radiateartery/ ^ A. interlobularis Stock Photo

RM2AJB0AN–An atlas of human anatomy for students and physicians . -;3, Convoluted tubules ,>} Tubuli renalcs contorti -- ^Malpighian corpuscles ^ (.<.ir[uiscula renis (Malpighii) Interlobular or radiateartery/ ^ A. interlobularis

. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. TESTICLE (NORMAL ANATOMY). thelial cells. There is no appearance of an intertubiilar substance ; the ducts are merely connected by a loose network of vessels, and consequently readily admit of being sepa- rated and unravelled. The tubes, when suc- cessfully injected with quicksilver, form a beautiful anatomical preparation. Sir A. Cooper succeeded in filling the tubes with size injection ; but he has not described the mode in which it was effected, and other anatomists have failed in similar attempts.* When the tubuli se Stock Photo

RMPFN4B2–. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. TESTICLE (NORMAL ANATOMY). thelial cells. There is no appearance of an intertubiilar substance ; the ducts are merely connected by a loose network of vessels, and consequently readily admit of being sepa- rated and unravelled. The tubes, when suc- cessfully injected with quicksilver, form a beautiful anatomical preparation. Sir A. Cooper succeeded in filling the tubes with size injection ; but he has not described the mode in which it was effected, and other anatomists have failed in similar attempts.* When the tubuli se

RMCRYKBM–DENTIN, SEM

. Electron microscopy; proceedings of the Stockholm Conference, September, 1956 . Fig. 2. Schematische Darstellung der Entstehung (A), der Vermelirung (B) und der Abscheidung (C) geformter Sekrete der Mitochondrien von Paramecium caiidati/m. drien eine Regeneration der Tubuli verfolgen, und zwar bilden sich in diesen entleerten Mitochon- drien zunachst wie in den Promitochondrien Mi- krotubuli, die wieder zu normalen Tubuli mito- chondriales heranwachsen. Wir haben hier also eine echte Regeneration ein- zelner Mitochondrien vor uns. Die Ergebnisse iiber Entstehung, Vermehrung und einen Funktio Stock Photo

RMMA7ABN–. Electron microscopy; proceedings of the Stockholm Conference, September, 1956 . Fig. 2. Schematische Darstellung der Entstehung (A), der Vermelirung (B) und der Abscheidung (C) geformter Sekrete der Mitochondrien von Paramecium caiidati/m. drien eine Regeneration der Tubuli verfolgen, und zwar bilden sich in diesen entleerten Mitochon- drien zunachst wie in den Promitochondrien Mi- krotubuli, die wieder zu normalen Tubuli mito- chondriales heranwachsen. Wir haben hier also eine echte Regeneration ein- zelner Mitochondrien vor uns. Die Ergebnisse iiber Entstehung, Vermehrung und einen Funktio

RMCRYEPJ–DENTIN, SEM

RMD3HG6M–ANATOMY, TOOTH

Archive image from page 478 of Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena denkschriftender15medi Year: 1879 69 Neue Beiträge zur Kenntnis des Urogenitalsystems der Säugetiere. 441 Der Canalis urethralis bietet die Merkwürdigkeit einer sehr wohlerhaltenen Prostata. Es ist eine aus verzweigten Tubuli bestehende, dem Hals der Harnblase vorgelagerte Drüse (Fig. 12, 13 c glprst). Die Röhren sind mit hohem Zylinderepithel ausgekleidet, besitzen eine zirkuläre glatte Muskelhülle und enthalten ein k Stock Photo

RMW1TET0–Archive image from page 478 of Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena denkschriftender15medi Year: 1879 69 Neue Beiträge zur Kenntnis des Urogenitalsystems der Säugetiere. 441 Der Canalis urethralis bietet die Merkwürdigkeit einer sehr wohlerhaltenen Prostata. Es ist eine aus verzweigten Tubuli bestehende, dem Hals der Harnblase vorgelagerte Drüse (Fig. 12, 13 c glprst). Die Röhren sind mit hohem Zylinderepithel ausgekleidet, besitzen eine zirkuläre glatte Muskelhülle und enthalten ein k

Chemistry : general, medical, and pharmaceutical including the chemistry of the U.Spharmacopoeia ; a manual on the general principles of the science, and their applications in medicine and pharmacy . Epithelial Cells and Tubuli. © rfE9 Blood Corpuscles. Stock Photo

RM2AX5HYM–Chemistry : general, medical, and pharmaceutical including the chemistry of the U.Spharmacopoeia ; a manual on the general principles of the science, and their applications in medicine and pharmacy . Epithelial Cells and Tubuli. © rfE9 Blood Corpuscles.

. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom. Paleontology; Eozoon; Life. Plate IV. > 1. Magnified and Restored Section of a portion of Eozoon Canadense. The portions in brown show the animal matter of the Chambers, Tubuli, Canals, and Pseudopodia; the portions uncoloured, the calcareous skeleton.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfect Stock Photo

RMPFG43X–. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom. Paleontology; Eozoon; Life. Plate IV. > 1. Magnified and Restored Section of a portion of Eozoon Canadense. The portions in brown show the animal matter of the Chambers, Tubuli, Canals, and Pseudopodia; the portions uncoloured, the calcareous skeleton.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfect

. Die Cephalopoden, I. Teil . Textfig. 49. Eine der vorigen entsprechende Figur nach einer jungen Sepia Orbignyana. 7,. Man erkennt die Weiterbildung der Nidamentaldrüsen (Nd) und der acc. Nidamentaldrüse (Ac), an der die Bildung von Drüsen- tubuli (dunkle Zone) gegen den Rand und nach vorne insbesondere fortschreitet. Od der juvenile Geschlechts- fortsatz; VI Vena pall. lat.; Kh Kiemenherz; Am Art. pall. med.; Vp Vena pall. post.; Tb Tintenbeutel; Mh hintere Grenze der Mantelhöhle. Textfig. 48. Mantelsitus einer jungen Sepia elegans. Vi- Fol- gende Teile sind festzustellen: die Afterpapille, Stock Photo

RMMEEB1B–. Die Cephalopoden, I. Teil . Textfig. 49. Eine der vorigen entsprechende Figur nach einer jungen Sepia Orbignyana. 7,. Man erkennt die Weiterbildung der Nidamentaldrüsen (Nd) und der acc. Nidamentaldrüse (Ac), an der die Bildung von Drüsen- tubuli (dunkle Zone) gegen den Rand und nach vorne insbesondere fortschreitet. Od der juvenile Geschlechts- fortsatz; VI Vena pall. lat.; Kh Kiemenherz; Am Art. pall. med.; Vp Vena pall. post.; Tb Tintenbeutel; Mh hintere Grenze der Mantelhöhle. Textfig. 48. Mantelsitus einer jungen Sepia elegans. Vi- Fol- gende Teile sind festzustellen: die Afterpapille,

RMD3HG69–ANATOMY, TOOTH

Archive image from page 485 of Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena denkschriftender15medi Year: 1879 448 M. Rauther, 76 der Drüsen des inneren Bündels (Ampullendrüsen) mit dem Samenleiter; indessen münden auch proximal- wärts von dieser Vereinigung noch vereinzelte Tubuli in den Samenleiter, auch tritt hier nicht die sonst beim Ductus ejaculatorius übliche Verengung ein. Alles zusammengenommen glaube ich, daß das äußere Bündel der Samenleiterdrüsen den Samenblasen homolog ist, und daß Stock Photo

RMW1THET–Archive image from page 485 of Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena denkschriftender15medi Year: 1879 448 M. Rauther, 76 der Drüsen des inneren Bündels (Ampullendrüsen) mit dem Samenleiter; indessen münden auch proximal- wärts von dieser Vereinigung noch vereinzelte Tubuli in den Samenleiter, auch tritt hier nicht die sonst beim Ductus ejaculatorius übliche Verengung ein. Alles zusammengenommen glaube ich, daß das äußere Bündel der Samenleiterdrüsen den Samenblasen homolog ist, und daß

. Relics of primeval life, beginning of life in the dawn of geological time. Fig. 52.—Acervuline Variety of Eozoon, Cote St. Pierre. (a) General form, half natural size. (3) Portion of cellular interior, magnified,showing the course of the tubuli.. Stock Photo

RM2AFJ3FE–. Relics of primeval life, beginning of life in the dawn of geological time. Fig. 52.—Acervuline Variety of Eozoon, Cote St. Pierre. (a) General form, half natural size. (3) Portion of cellular interior, magnified,showing the course of the tubuli..

RMPFG436–. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom. Paleontology; Eozoon; Life. WHAT IS EOZOON tendency to form a supplemental or intermediate skele- ton with canals^ though the canals themselves in their arrangement more nearly resemble Calcarina, which. Fig. 19. Section of a Nummulite, from Eocene Limestone of Syiia. Showing chambers, tubuli, and canals. Compare this and fig. 20 with figs. 10 and 11.. Please note that these images are extracted from scanned page images that may have been dig

. Einführung in die vergleichende Anatomie der Wirbeltiere, für Studierende . Fig. 300. S c h e in a t i s ch e D a r- stellung der erst sekun- där erfolgenden Verbin- dung der Urnieren-Kanäl- chen mit dem S ammeigang SG. Die vorderen zwei bei A haben den Sammelgang schon erreicht, die beiden hinteren (5) noch nicht. DS Drüsenschlinge, Eii Endstück derselben, M Malpighi 'seh es Körperchen, 8T Segmentiütrichter. Metanephros. Sämtliche Kanälchen der Ur- niere, sowie die Tubuli contorti und die Glomeruli der Nachniere entstehen aus einem und demselben, prinzipiell gleichen Gewebe („nephro- genes Stock Photo

RMMA7E1T–. Einführung in die vergleichende Anatomie der Wirbeltiere, für Studierende . Fig. 300. S c h e in a t i s ch e D a r- stellung der erst sekun- där erfolgenden Verbin- dung der Urnieren-Kanäl- chen mit dem S ammeigang SG. Die vorderen zwei bei A haben den Sammelgang schon erreicht, die beiden hinteren (5) noch nicht. DS Drüsenschlinge, Eii Endstück derselben, M Malpighi 'seh es Körperchen, 8T Segmentiütrichter. Metanephros. Sämtliche Kanälchen der Ur- niere, sowie die Tubuli contorti und die Glomeruli der Nachniere entstehen aus einem und demselben, prinzipiell gleichen Gewebe („nephro- genes

RMD3HG6F–ANATOMY, TOOTH

Electron microscopy; proceedings of the Electron microscopy; proceedings of the Stockholm Conference, September, 1956 . electronmicrosco00euro Year: 1957 Changes in ihc Ciliary Epithelium 139 -Endoplosma VKl^ Ektoplasma - Fig. 2. Schematische Darstellung der Entstehung (A), der Vermelirung (B) und der Abscheidung (C) geformter Sekrete der Mitochondrien von Paramecium caiidati/m. drien eine Regeneration der Tubuli verfolgen, und zwar bilden sich in diesen entleerten Mitochon- drien zunachst wie in den Promitochondrien Mi- krotubuli, die wieder zu normalen Tubuli mito- chondriales heranwachs Stock Photo

RMRYNR5Y–Electron microscopy; proceedings of the Electron microscopy; proceedings of the Stockholm Conference, September, 1956 . electronmicrosco00euro Year: 1957 Changes in ihc Ciliary Epithelium 139 -Endoplosma VKl^ Ektoplasma - Fig. 2. Schematische Darstellung der Entstehung (A), der Vermelirung (B) und der Abscheidung (C) geformter Sekrete der Mitochondrien von Paramecium caiidati/m. drien eine Regeneration der Tubuli verfolgen, und zwar bilden sich in diesen entleerten Mitochon- drien zunachst wie in den Promitochondrien Mi- krotubuli, die wieder zu normalen Tubuli mito- chondriales heranwachs

RM2AFJ3JR–. Relics of primeval life, beginning of life in the dawn of geological time. Fig. 52.—Acervuline Variety of Eozoon, Cote St. Pierre. (a) General form, half natural size. (3) Portion of cellular interior, magnified,showing the course of the tubuli.

RMPFG405–. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom. Paleontology; Eozoon; Life. FiG. 31. AcervuUne Variety of Eozoon, St. Pierre. (7.) General form, half natural size. (&.) Portion of cellular interior, magnified, showing the course of the tubuli. tinct species, it would be difficult to determine. In the meantime I have described it as a variety, '' acervu- liiia/' of the species Eozoon Canadense.* Another variety also, from Petite Nation, shows extremely thin laminse, closely placed toget

. R 1- Fd Fig-. 193. Schnitt durch ein Ovarium von Fehs domestica, nach K. C. Schneider. 7" Tunica albuginea; R Bindegewebe der Rinde; G Gefäße der Marlisubstanz; //Hihis ovarii; E Epoophoron; pI" Priniärfollikel; Fv Sekundärfollikel mit Liquor gefüllt, mit hügelförmig vorspringendem Cumulus oophorus, der das Ei enthält; /^(/degenerierende, F sich entwickelnder Follikel; C Corpus luteum. Fig. 194. Testikel, umgeben durch die Tuiiica albuginea A die durch bindegewebige Septula s, den Hoden in Lappen verteilt. In diesen liegen die TnbuH contorti tc, die in die Tubuli recti /;• übergehe Stock Photo

RMMCNN9Y–. R 1- Fd Fig-. 193. Schnitt durch ein Ovarium von Fehs domestica, nach K. C. Schneider. 7" Tunica albuginea; R Bindegewebe der Rinde; G Gefäße der Marlisubstanz; //Hihis ovarii; E Epoophoron; pI" Priniärfollikel; Fv Sekundärfollikel mit Liquor gefüllt, mit hügelförmig vorspringendem Cumulus oophorus, der das Ei enthält; /^(/degenerierende, F sich entwickelnder Follikel; C Corpus luteum. Fig. 194. Testikel, umgeben durch die Tuiiica albuginea A die durch bindegewebige Septula s, den Hoden in Lappen verteilt. In diesen liegen die TnbuH contorti tc, die in die Tubuli recti /;• übergehe

RMD3HG6J–ANATOMY, TOOTH

Principles and practice of operative dentistry . Fig. 153—Longitudinal section of anincisor. (After Stowell.) Fig. 154.—Longitudinal section of an inferiormolar. (After Stowell.) Pulp-canal. Dentinal tubuli Secondar}- dentin Fig. 155.—Transverse section of root of human bicuspid, showing radiation of the dentinal tubuli. Stock Photo

RM2ANG4WB–Principles and practice of operative dentistry . Fig. 153—Longitudinal section of anincisor. (After Stowell.) Fig. 154.—Longitudinal section of an inferiormolar. (After Stowell.) Pulp-canal. Dentinal tubuli Secondar}- dentin Fig. 155.—Transverse section of root of human bicuspid, showing radiation of the dentinal tubuli.

RMPFG40R–. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom. Paleontology; Eozoon; Life. THE PRESERVATION OF lOZOON. Ill (&g. 30) presents a clavate form, as if it had been a detached individual supported on one end at the bottom of the sea. It shows,, as does also the original Calumet specimen, the septa approaching each other and coal- escing at the margin of the form, where there were. Fig. 30. Eozoon from Tudor. Two-thirds natural size, (a.) Tubuli. (b.) Canals. Magnified. a and b from another

. Die descriptive und topographische Anatomie des Menschen . :7 f 44<S. Längsschnitt durch die Niere. Die Art. renalis verläuft vom Bilus aus zwischen den Pyramiden gegen die Überdache, unzählige, nicht mit einander anastomosirende Aeste abgebend: diese Aeste knäueln sich auf, indem sie die von einer Kapsel umhüllten Glomeruli renales bilden. Im Knäuel ist die Arterie mehrfach gespalten, aus dem Glomendus tritt sie einlach hervor und zerfällt jetzt erst in Capillaren, aus denen die Venen hervor- gehen. Die Harncanälchen, Tubuli uriniferi, beginnen an der Kapsel des Glo- mendus gegenüber jen Stock Photo

RMMEHD3D–. Die descriptive und topographische Anatomie des Menschen . :7 f 44<S. Längsschnitt durch die Niere. Die Art. renalis verläuft vom Bilus aus zwischen den Pyramiden gegen die Überdache, unzählige, nicht mit einander anastomosirende Aeste abgebend: diese Aeste knäueln sich auf, indem sie die von einer Kapsel umhüllten Glomeruli renales bilden. Im Knäuel ist die Arterie mehrfach gespalten, aus dem Glomendus tritt sie einlach hervor und zerfällt jetzt erst in Capillaren, aus denen die Venen hervor- gehen. Die Harncanälchen, Tubuli uriniferi, beginnen an der Kapsel des Glo- mendus gegenüber jen

Principles and practice of operative dentistry . Fig. 287.—Infected human dentin, showing advanced state of infection. (V. A. Latham.) X 100.A, A, A, micro-organisms in the tubuli. The darlj portion shows decalcified and discolored areas ofdentin. -;?^i ;s^. r. Stock Photo

RM2AKPF2N–Principles and practice of operative dentistry . Fig. 287.—Infected human dentin, showing advanced state of infection. (V. A. Latham.) X 100.A, A, A, micro-organisms in the tubuli. The darlj portion shows decalcified and discolored areas ofdentin. -;?^i ;s^. r.

RMPFG3W7–. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom. Paleontology; Eozoon; Life. 176 THE DAWN OF LIFS. or have been given; and I now merely add (in fig. 49) a magnified camera tracing of a portion of a lamina of Eozoon witli its canals and tubuli, to show more fully tlie nature of tlie structures in controversy. a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not

. Fig. 193. Schnitt durch ein Ovarium von Felis domestica, nach K. C. Schneider. T'Tunica albuginea; R Bindegewebe der Rinde; G GefÃ¤Ãe der Marksubstanz; Ã^Hiius ovarÃ¼; E Epoophoron; pP FrimÃ¤rfollikel; Fv SekundÃ¤rfollikel mit Liquor gefÃ¼llt, mit hÃ¼gelfÃ¶rmig vorspringendem Cumulus oophorus, der das Ei enthÃ¤lt; i^c/degenerierende, F sich entwickelnder Follikel; C Corpus luteum. Fig. 194. Testikel, umgeben durch die Tunica albuginea t, die durch bindegewebige Septula s, den Hoden in Lappen verteilt. In diesen liegen die Tubuli contorti tc. die in die Tubuli recti //â Ã¼bergehen, den Highmo Stock Photo

RMMCNN4A–. Fig. 193. Schnitt durch ein Ovarium von Felis domestica, nach K. C. Schneider. T'Tunica albuginea; R Bindegewebe der Rinde; G GefÃ¤Ãe der Marksubstanz; Ã^Hiius ovarÃ¼; E Epoophoron; pP FrimÃ¤rfollikel; Fv SekundÃ¤rfollikel mit Liquor gefÃ¼llt, mit hÃ¼gelfÃ¶rmig vorspringendem Cumulus oophorus, der das Ei enthÃ¤lt; i^c/degenerierende, F sich entwickelnder Follikel; C Corpus luteum. Fig. 194. Testikel, umgeben durch die Tunica albuginea t, die durch bindegewebige Septula s, den Hoden in Lappen verteilt. In diesen liegen die Tubuli contorti tc. die in die Tubuli recti //â Ã¼bergehen, den Highmo

Principles and practice of operative dentistry . Cariesfollowing -m^ Fig. 159.—Section of dentin and enamel, showing tubuli entering the enamel. (V. A. Latham.) Ameloblasts Formed enamel. Fig. 160.—Vertical section of developing human tooth, showing dentinal fibres passing from the dentin to the enamel. X 1000. Stock Photo

RM2ANG174–Principles and practice of operative dentistry . Cariesfollowing -m^ Fig. 159.—Section of dentin and enamel, showing tubuli entering the enamel. (V. A. Latham.) Ameloblasts Formed enamel. Fig. 160.—Vertical section of developing human tooth, showing dentinal fibres passing from the dentin to the enamel. X 1000.

. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. KIDNEYS or FISHES. 535 firmest at tlie fore-part of the gland; visually of a reddisli-brown colour; sometimes soaked, as it were, with dark pigment' It is supplied by numerous small arteries from the abdominal aorta,^ which form Malpighian corpuscles; but these are fewer in number and less complex than in the true kidneys of higher Vertebrates. The primary branches of the tubuli uriniferi, gi^'cn off from the long ureter, are extremely numerous ; their divisions in the renal substance are comparatively few; they are in m Stock Photo

RMPG2HHM–. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. KIDNEYS or FISHES. 535 firmest at tlie fore-part of the gland; visually of a reddisli-brown colour; sometimes soaked, as it were, with dark pigment' It is supplied by numerous small arteries from the abdominal aorta,^ which form Malpighian corpuscles; but these are fewer in number and less complex than in the true kidneys of higher Vertebrates. The primary branches of the tubuli uriniferi, gi^'cn off from the long ureter, are extremely numerous ; their divisions in the renal substance are comparatively few; they are in m

Principles and practice of operative dentistry . Fig. l.te.—Longitudinal section of an,incisor. (After Stowell.) Fig. 154.—Longitudinal section of an inferiormolar. (After Stowell.) Pulp-canal. Dentinal tubuli Cementum Secondary dentin Fig. 155.—Transverse section of root of human bicuspid, showing radiation of the dentinal tubuli. Stock Photo

RM2AKW6EM–Principles and practice of operative dentistry . Fig. l.te.—Longitudinal section of an,incisor. (After Stowell.) Fig. 154.—Longitudinal section of an inferiormolar. (After Stowell.) Pulp-canal. Dentinal tubuli Cementum Secondary dentin Fig. 155.—Transverse section of root of human bicuspid, showing radiation of the dentinal tubuli.

RMPFG42T–. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom. Paleontology; Eozoon; Life. Fig. 19. Section of a Nummulite, from Eocene Limestone of Syiia. Showing chambers, tubuli, and canals. Compare this and fig. 20 with figs. 10 and 11.. Fig. 20. Portion of shell of Calcarina. Magnified, after Carpenter, fa.) Cells, (b.) Original cell-wall with tulouli. (c.) Supplementary skeleton with canals. is represented in fig. 20. In its superposition of many layers, and in its tendency to a heaped up or acervu

Principles and practice of operative dentistry . Fig. 290.—Longitudinal section of infected human dentin, showing the pipe-stem appearance of thetubules described by Tomes. (R. R. Andrews.). Fig. 291.—Infected human dentin. (V. A. Latham.) X 102.5. A, micro-organisms in the tubuli;B, B, micro-organisms in the interglobular spaces. Stock Photo

RM2AKPCK2–Principles and practice of operative dentistry . Fig. 290.—Longitudinal section of infected human dentin, showing the pipe-stem appearance of thetubules described by Tomes. (R. R. Andrews.). Fig. 291.—Infected human dentin. (V. A. Latham.) X 102.5. A, micro-organisms in the tubuli;B, B, micro-organisms in the interglobular spaces.

. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Part of the proventriculus of a Swan dissected. a conical shape. In the Swan they are tubuli- form ; in the Goose and Turkey they present internal loculi; in the Ostrich and Rhea these loculi are so developed that each gland forms a racemose group of follicles, terminating by a common aperture in the proventriculus. The subjoined figures from Home's Com- parative Anatomy (vol. ii. pi. Ivi.) show the different forms of the solvent or proventricular glands in different birds. Fig. 160. Eagle. Gannet. Sea-gull. Pigeon. Swan Stock Photo

RMPFN828–. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Part of the proventriculus of a Swan dissected. a conical shape. In the Swan they are tubuli- form ; in the Goose and Turkey they present internal loculi; in the Ostrich and Rhea these loculi are so developed that each gland forms a racemose group of follicles, terminating by a common aperture in the proventriculus. The subjoined figures from Home's Com- parative Anatomy (vol. ii. pi. Ivi.) show the different forms of the solvent or proventricular glands in different birds. Fig. 160. Eagle. Gannet. Sea-gull. Pigeon. Swan

Principles and practice of operative dentistry . Fig. 287.—Infected human dentin, showing advanced state of infection. (V. A. Latham.) ?, 100.A, A, A, micro-organisms in the tubuli. The dark portion shows decalcified and discolored areas ofdentin.. Fig. 288.—Transverse section of human dentin, showing pipe-stem appearance of infected dentinaltubules. (Tomes.) Stock Photo

RM2ANE16B–Principles and practice of operative dentistry . Fig. 287.—Infected human dentin, showing advanced state of infection. (V. A. Latham.) ?, 100.A, A, A, micro-organisms in the tubuli. The dark portion shows decalcified and discolored areas ofdentin.. Fig. 288.—Transverse section of human dentin, showing pipe-stem appearance of infected dentinaltubules. (Tomes.)

. Cunningham's Text-book of anatomy. Anatomy. Head of epididymi Appendix of testis. Ductus deferens Duct of epididymis Fig. 1007.—Left Testis and Epididymis viewed fko.m behind, showing the ductus epididymidis and the first part of the ductus deferens. Tail of^p^'' epididymis Fig. 1006. Diagram to illustrate the structure of the testis and epididymis. c. Duct of epididymis. v.e. Ductuli efferentes testis. c.v. Lobuli of epididymis. v.r. Tubuli seminiferi recti. r. v. Rete testis. a long course, reaches the posterior border of the testis, where it breaks up into branches which enter the mediast Stock Photo

RMPFY3PW–. Cunningham's Text-book of anatomy. Anatomy. Head of epididymi Appendix of testis. Ductus deferens Duct of epididymis Fig. 1007.—Left Testis and Epididymis viewed fko.m behind, showing the ductus epididymidis and the first part of the ductus deferens. Tail of^p^'' epididymis Fig. 1006. Diagram to illustrate the structure of the testis and epididymis. c. Duct of epididymis. v.e. Ductuli efferentes testis. c.v. Lobuli of epididymis. v.r. Tubuli seminiferi recti. r. v. Rete testis. a long course, reaches the posterior border of the testis, where it breaks up into branches which enter the mediast

Principles and practice of operative dentistry . Fig. 291.—Infected human dentin. (V. A. Latham.) X 102.5. A, micro-organisms in the tubuli;B, B, micro-organisms in the interglobular spaces.. A Fig. 292.—Infected human dentin. (R. R. Andrews.) A, A, A, showing penetration of micro-organisms in the tubuli. Stock Photo

RM2AKP9R5–Principles and practice of operative dentistry . Fig. 291.—Infected human dentin. (V. A. Latham.) X 102.5. A, micro-organisms in the tubuli;B, B, micro-organisms in the interglobular spaces.. A Fig. 292.—Infected human dentin. (R. R. Andrews.) A, A, A, showing penetration of micro-organisms in the tubuli.

. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena. 69 Neue Beiträge zur Kenntnis des Urogenitalsystems der Säugetiere. 441 Der Canalis urethralis bietet die Merkwürdigkeit einer sehr wohlerhaltenen Prostata. Es ist eine aus verzweigten Tubuli bestehende, dem Hals der Harnblase vorgelagerte Drüse (Fig. 12, 13 c glprst). Die Röhren sind mit hohem Zylinderepithel ausgekleidet, besitzen eine zirkuläre glatte Muskelhülle und enthalten ein koaguliertes, feinkörniges, mitunter auch größere kugelförmige Gebilde einschließendes Sekret, sie werden durch Bindegewebe zu Läppchen Stock Photo

RMPFGYXN–. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena. 69 Neue Beiträge zur Kenntnis des Urogenitalsystems der Säugetiere. 441 Der Canalis urethralis bietet die Merkwürdigkeit einer sehr wohlerhaltenen Prostata. Es ist eine aus verzweigten Tubuli bestehende, dem Hals der Harnblase vorgelagerte Drüse (Fig. 12, 13 c glprst). Die Röhren sind mit hohem Zylinderepithel ausgekleidet, besitzen eine zirkuläre glatte Muskelhülle und enthalten ein koaguliertes, feinkörniges, mitunter auch größere kugelförmige Gebilde einschließendes Sekret, sie werden durch Bindegewebe zu Läppchen

Principles and practice of operative dentistry . Fig. 2.%.—Oblique seetioi (1 human dentin, showing confluence of tubules forming largercavities. (R. R. Andrews.). Fig. 287.—Infected human dentin, showing advanced state of infection. (V. A. Latham.) ?, 100.A, A, A, micro-organisms in the tubuli. The dark portion shows decalcified and discolored areas ofdentin. Stock Photo

RM2ANE1D3–Principles and practice of operative dentistry . Fig. 2.%.—Oblique seetioi (1 human dentin, showing confluence of tubules forming largercavities. (R. R. Andrews.). Fig. 287.—Infected human dentin, showing advanced state of infection. (V. A. Latham.) ?, 100.A, A, A, micro-organisms in the tubuli. The dark portion shows decalcified and discolored areas ofdentin.

. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena. 356 Der feinere Bau der Leber von Ceratodus forsten. 24 reichlichere Körnelung ausgezeichnet. Zwischen den im Zellcentrum weiten, an der Zellperipherie engen Maschen des Wabenbaues finden sich grössere oder kleinere Hohlräume, welche, wie ich aus Analogien zu schliessen mich für berechtigt halte, im Leben wohl mit Fetttröpfchen und Glykogenschollen erfüllt gewesen sein werden, die aber durch den Alkohol bei der Härtung extrahirt wurden. Gegen das Centrallumen der Tubuli hin fanden sich in den Leberzellen noch andere Stock Photo

RMPFE1JF–. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena. 356 Der feinere Bau der Leber von Ceratodus forsten. 24 reichlichere Körnelung ausgezeichnet. Zwischen den im Zellcentrum weiten, an der Zellperipherie engen Maschen des Wabenbaues finden sich grössere oder kleinere Hohlräume, welche, wie ich aus Analogien zu schliessen mich für berechtigt halte, im Leben wohl mit Fetttröpfchen und Glykogenschollen erfüllt gewesen sein werden, die aber durch den Alkohol bei der Härtung extrahirt wurden. Gegen das Centrallumen der Tubuli hin fanden sich in den Leberzellen noch andere

The microscope and its revelations . Fig. 302. Perpendicular section of tooth of Lamna, moderatelyenlarged, showing network of medullary canals. Fig. 303. Transverse section of portion of tooth of Prisiis, morehighly magnified, showing orifices of medullary eanals, vnth systemsof radiating and inosculating tubuli. suiTounded by a system of tubuli (Fig, 303), which radiate into the surrounding solid substance. These tubuli, however, YT 2 692 YERTEBEATED ANIMALS. Fi&. 304. Stock Photo

RM2AWR3K0–The microscope and its revelations . Fig. 302. Perpendicular section of tooth of Lamna, moderatelyenlarged, showing network of medullary canals. Fig. 303. Transverse section of portion of tooth of Prisiis, morehighly magnified, showing orifices of medullary eanals, vnth systemsof radiating and inosculating tubuli. suiTounded by a system of tubuli (Fig, 303), which radiate into the surrounding solid substance. These tubuli, however, YT 2 692 YERTEBEATED ANIMALS. Fi&. 304.

. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena. 448 M. Rauther, 76 der Drüsen des inneren Bündels (Ampullendrüsen) mit dem Samenleiter; indessen münden auch proximal- wärts von dieser Vereinigung noch vereinzelte Tubuli in den Samenleiter, auch tritt hier nicht die sonst beim Ductus ejaculatorius übliche Verengung ein. Alles zusammengenommen glaube ich, daß das äußere Bündel der Samenleiterdrüsen den Samenblasen homolog ist, und daß die Differenzen der beiderlei Bildungen wohl so zu verstehen sind, daß bei jenen die Individualität der einzelnen Alveolen vollständi Stock Photo

RMPFHC1R–. Denkschriften der Medicinisch-Naturwissenschaftlichen Gesellschaft zu Jena. 448 M. Rauther, 76 der Drüsen des inneren Bündels (Ampullendrüsen) mit dem Samenleiter; indessen münden auch proximal- wärts von dieser Vereinigung noch vereinzelte Tubuli in den Samenleiter, auch tritt hier nicht die sonst beim Ductus ejaculatorius übliche Verengung ein. Alles zusammengenommen glaube ich, daß das äußere Bündel der Samenleiterdrüsen den Samenblasen homolog ist, und daß die Differenzen der beiderlei Bildungen wohl so zu verstehen sind, daß bei jenen die Individualität der einzelnen Alveolen vollständi

Carpenter's principles of human physiology . they all seem to commence in little masses of cells, formed by anincreased development, at certain spots, of the layers of blastema whichoriginally constituted its wall; and whilst the cells of the mesoblast giveorigin to the proper vesicles of each gland, its ducts and tubuli, those of thehypoblast or epiblast form their epithelial lining.—The development of theSpleen and of the Adrenal, Thymus, and Thyroid bodies, have been alreadydescribed. 745. The Lungs are also developed from the mesoblast in immediate rela-tion with the upper part of the Alim Stock Photo

RM2AN2TKN–Carpenter's principles of human physiology . they all seem to commence in little masses of cells, formed by anincreased development, at certain spots, of the layers of blastema whichoriginally constituted its wall; and whilst the cells of the mesoblast giveorigin to the proper vesicles of each gland, its ducts and tubuli, those of thehypoblast or epiblast form their epithelial lining.—The development of theSpleen and of the Adrenal, Thymus, and Thyroid bodies, have been alreadydescribed. 745. The Lungs are also developed from the mesoblast in immediate rela-tion with the upper part of the Alim

. Dictionnaire de physiologie. Physiology. 1 2 FiG. 257. 1. â Section transversale delÃ muqueuse cardiaque chez le porc. D'aprÃ¨s Ellenberger et Hofmeister. 2. â Section transversale d'un tubuli de la rÃ©gion cardiaque chez le porc. D'aprÃ¨s les mÃªmes auteurs. colore faiblement par ^l'Ã©osine. En outre, le.s glandes de la rÃ©gion cardiaque sont trÃ¨s riches en follicules lymphatiques. D'une maniÃ¨re gÃ©nÃ©rale les glandes cardiaques existent chez la plupart des MammifÃ¨res. Elles manquent nÃ©anmoins chez les espÃ¨ces suivantes : chez tous les MonotrÃ¨mes,chez quelques Rongeurs (Lagomorpha, Hy Stock Photo

RMPFATEB–. Dictionnaire de physiologie. Physiology. 1 2 FiG. 257. 1. â Section transversale delÃ muqueuse cardiaque chez le porc. D'aprÃ¨s Ellenberger et Hofmeister. 2. â Section transversale d'un tubuli de la rÃ©gion cardiaque chez le porc. D'aprÃ¨s les mÃªmes auteurs. colore faiblement par ^l'Ã©osine. En outre, le.s glandes de la rÃ©gion cardiaque sont trÃ¨s riches en follicules lymphatiques. D'une maniÃ¨re gÃ©nÃ©rale les glandes cardiaques existent chez la plupart des MammifÃ¨res. Elles manquent nÃ©anmoins chez les espÃ¨ces suivantes : chez tous les MonotrÃ¨mes,chez quelques Rongeurs (Lagomorpha, Hy

Principles and practice of operative dentistry . Fig. 2,s6.—Obliciue section of infected human dentin, showing confluence of tubules forming larger cavities. (R. R. Andrews.). Fig. 287.—Infected human dentin, showing advanced state of infection. (V. A. Latham.) X 100.A, A, A, micro-organisms in the tubuli. The darlj portion shows decalcified and discolored areas ofdentin. -;?^i ;s^. r Stock Photo

RM2AKPFHR–Principles and practice of operative dentistry . Fig. 2,s6.—Obliciue section of infected human dentin, showing confluence of tubules forming larger cavities. (R. R. Andrews.). Fig. 287.—Infected human dentin, showing advanced state of infection. (V. A. Latham.) X 100.A, A, A, micro-organisms in the tubuli. The darlj portion shows decalcified and discolored areas ofdentin. -;?^i ;s^. r

The microscope and its revelations . h sometimes parallel, usu-ally have more of a reticulated arrangement, and sometimesdilate into irregular lacunse or spaces excavated in the hardsubstance.* The Author is not prepared to speak with con-fidence on this point; but he is disposed to think that thestructure of the teeth is essentially the same as that of theshell, save in the interspaces of the network being muchnarrower; and that the appearance of tubuli (in which Mr.Quekett has not been able to make-out distinct walls) is duemerely to the elongation of these interspaces. 315. The calcare-ous Stock Photo

RM2AWT4A9–The microscope and its revelations . h sometimes parallel, usu-ally have more of a reticulated arrangement, and sometimesdilate into irregular lacunse or spaces excavated in the hardsubstance.* The Author is not prepared to speak with con-fidence on this point; but he is disposed to think that thestructure of the teeth is essentially the same as that of theshell, save in the interspaces of the network being muchnarrower; and that the appearance of tubuli (in which Mr.Quekett has not been able to make-out distinct walls) is duemerely to the elongation of these interspaces. 315. The calcare-ous

Principles and practice of operative dentistry . ed to produce anaesthesia. Itis a law of electricity that the current travels by the path of the leastresistance. This in the vital tooth is by the organic matter in the tubuliand the contents of the pulp-chamber. Primary anaesthesia will thereforeoccur only over the radius covered by the positive pole, because the currentpasses directly from the anode to those tubuli which are in the direct pathof the current. Secondary anaesthesia of the dentin may be secured byproducing anaesthesia of the pulp, as no doubt occurred in some of thosecases repor Stock Photo

RM2ANDBJH–Principles and practice of operative dentistry . ed to produce anaesthesia. Itis a law of electricity that the current travels by the path of the leastresistance. This in the vital tooth is by the organic matter in the tubuliand the contents of the pulp-chamber. Primary anaesthesia will thereforeoccur only over the radius covered by the positive pole, because the currentpasses directly from the anode to those tubuli which are in the direct pathof the current. Secondary anaesthesia of the dentin may be secured byproducing anaesthesia of the pulp, as no doubt occurred in some of thosecases repor

Rare and remarkable animals of Scotland, represented from living subjects: with practical observations on their nature . which are older, such as theTubularia (Scrtularia) ramea, and the Sertularia (Nemertesia) ramosa, thestem having attained considerable diameter, will be found to consist ofnumerous parallel tubuli; and, in both it is quite inflexible, remaining up-right, though the smaller parts yield when unsupported by the water. Different portions of the branches of the Tubularia ramea are indentedby whorls, and especially the extremities.—PI. VIII. fig. 3. But for themost part they are f Stock Photo

RM2AWY2BJ–Rare and remarkable animals of Scotland, represented from living subjects: with practical observations on their nature . which are older, such as theTubularia (Scrtularia) ramea, and the Sertularia (Nemertesia) ramosa, thestem having attained considerable diameter, will be found to consist ofnumerous parallel tubuli; and, in both it is quite inflexible, remaining up-right, though the smaller parts yield when unsupported by the water. Different portions of the branches of the Tubularia ramea are indentedby whorls, and especially the extremities.—PI. VIII. fig. 3. But for themost part they are f

Dental cosmos . n with the cure of existing lesions, con-sists in as thorough a performance as possible of the followingoperations : First, removal of the contents of the root-canals. Second, disinfection of the root-canals and dentine, and the estab-lishment of permanent aseptic conditions by mummification of thecontents of the tubuli. Third, closure of the apical foramen. Preparation of Root-Canals.—A knowledge of the usual positions,forms, and variations of the roots and canals in the different teeth isessential for a generally successful performance of this operation,which is greatly facil Stock Photo

RM2AWGYGJ–Dental cosmos . n with the cure of existing lesions, con-sists in as thorough a performance as possible of the followingoperations : First, removal of the contents of the root-canals. Second, disinfection of the root-canals and dentine, and the estab-lishment of permanent aseptic conditions by mummification of thecontents of the tubuli. Third, closure of the apical foramen. Preparation of Root-Canals.—A knowledge of the usual positions,forms, and variations of the roots and canals in the different teeth isessential for a generally successful performance of this operation,which is greatly facil

A practical treatise on urinary and renal diseases : including urinary deposits . in support ofthis view the total absence of the renal calices and pelvis, and also the uretersin many cases of this disease. Kupfers investigations into the developmentof the kidney, showing that the blastema for the tubuli uriniferi is developedby itself, independently of the evolution of the Wolffian duct (which becomesureter and renal pelvis) will if confirmed tend greatly to strengthen the theoryadvocated by Koster. Origin, of the Congenital Renal Cystoid. Nederlandsch.Arch. v. Gen. in Naturkunde, 1867, trans Stock Photo

RM2AN88T6–A practical treatise on urinary and renal diseases : including urinary deposits . in support ofthis view the total absence of the renal calices and pelvis, and also the uretersin many cases of this disease. Kupfers investigations into the developmentof the kidney, showing that the blastema for the tubuli uriniferi is developedby itself, independently of the evolution of the Wolffian duct (which becomesureter and renal pelvis) will if confirmed tend greatly to strengthen the theoryadvocated by Koster. Origin, of the Congenital Renal Cystoid. Nederlandsch.Arch. v. Gen. in Naturkunde, 1867, trans

On the structure and affinities of the genus Monticulipora and its sub-genera, with critical descriptions of illustrative species . regularly rounded apertures of alargely developed series of small interstitial corallites. As regards internal structure, the corallites are at first thin-walled, but become thickened in the outer part of their course,their walls becoming at the same time seemingly fused together.The small angular interstitial corallites occupy all the intervalsleft between the oval or rounded large tubes, and there is alargely developed series of thick-walled hollow tubuli ( spin Stock Photo

RM2AKBKYD–On the structure and affinities of the genus Monticulipora and its sub-genera, with critical descriptions of illustrative species . regularly rounded apertures of alargely developed series of small interstitial corallites. As regards internal structure, the corallites are at first thin-walled, but become thickened in the outer part of their course,their walls becoming at the same time seemingly fused together.The small angular interstitial corallites occupy all the intervalsleft between the oval or rounded large tubes, and there is alargely developed series of thick-walled hollow tubuli ( spin

Manual of pathological anatomy . its formative action, and throws outa barrier -between itself and the advancing mischief. How veryanalogous is this to the throwing out of lymph on the outersurface of a hollow viscus which is threatened with ulcerativeperforation I The structure of secondary dentine is not so perfect as theoriginal, and it is commonly vascular. Under the microscope a transverse section of carious dentine, rendered soft, like car-tilage, from the loss of its lime, presents a cribriform appearance.The tubuli are much enlarged and irregular in outline, differingentirely from thei Stock Photo

RM2AM80FY–Manual of pathological anatomy . its formative action, and throws outa barrier -between itself and the advancing mischief. How veryanalogous is this to the throwing out of lymph on the outersurface of a hollow viscus which is threatened with ulcerativeperforation I The structure of secondary dentine is not so perfect as theoriginal, and it is commonly vascular. Under the microscope a transverse section of carious dentine, rendered soft, like car-tilage, from the loss of its lime, presents a cribriform appearance.The tubuli are much enlarged and irregular in outline, differingentirely from thei

. Relics of primeval life, beginning of life in the dawn of geological time. Fig. 35.—Structure of sviall spenmeit of Eozoon, calcareous i?iatterremoved. I. Natural size. 2. Acervuline cells of upper part. 3. Group of the same coalesc-ing into a lamina with tuberculated surface. 4. Laminae with tuberculated surfacesin section. (See also Fig. 36.) 155 THE DAWN OF LIFE is; larger canals are filled with serpentine of a lightgreen or olive colour, and the finer tubuli are in-jected with dolomite. It may also be observed Stock Photo

RM2AFJ8D4–. Relics of primeval life, beginning of life in the dawn of geological time. Fig. 35.—Structure of sviall spenmeit of Eozoon, calcareous i?iatterremoved. I. Natural size. 2. Acervuline cells of upper part. 3. Group of the same coalesc-ing into a lamina with tuberculated surface. 4. Laminae with tuberculated surfacesin section. (See also Fig. 36.) 155 THE DAWN OF LIFE is; larger canals are filled with serpentine of a lightgreen or olive colour, and the finer tubuli are in-jected with dolomite. It may also be observed

Principles and practice of operative dentistry . Section of root, parallel to dentinal canals. (After Stowell.) It is further observed that Hke the canaHculi of bone the dentinal tubuligive off numerous branches in their course which unite with neighboringtubuli and with each other (Fig. 157). As the tubuli approach the surfacethe division is more rapid, and the size of the branches is cor- ^ ^^^ -^^^• respondingly decreased. At theexternal surface of the dentinmany of the tubules unite byanastomosis (Fig. 158), othersterminate in the granular layerof Purkinje and Tomes, whilea third set penet Stock Photo

RM2AKW4A7–Principles and practice of operative dentistry . Section of root, parallel to dentinal canals. (After Stowell.) It is further observed that Hke the canaHculi of bone the dentinal tubuligive off numerous branches in their course which unite with neighboringtubuli and with each other (Fig. 157). As the tubuli approach the surfacethe division is more rapid, and the size of the branches is cor- ^ ^^^ -^^^• respondingly decreased. At theexternal surface of the dentinmany of the tubules unite byanastomosis (Fig. 158), othersterminate in the granular layerof Purkinje and Tomes, whilea third set penet

Principles and practice of operative dentistry . calcified and discolored enamel around thecarious cavity ; 2, dark zones ; s, clearer zones; zp, oldest zones, where putrefaction of the tooth-cartilage begins ; c, outer transparent zone, or zone of Tomes ; sd, secondary dentin, caused by irritation ;sd, secondary dentin deposited by normal physiological process, recession of the pulp. perience would seem to indicate that it has an effect upon the dentinwhich renders it more resistant to the progress of the disease. Expansion of the Tubuli,—Sections of carious dentin cut parallelwith the long a Stock Photo

RM2ANE2GX–Principles and practice of operative dentistry . calcified and discolored enamel around thecarious cavity ; 2, dark zones ; s, clearer zones; zp, oldest zones, where putrefaction of the tooth-cartilage begins ; c, outer transparent zone, or zone of Tomes ; sd, secondary dentin, caused by irritation ;sd, secondary dentin deposited by normal physiological process, recession of the pulp. perience would seem to indicate that it has an effect upon the dentinwhich renders it more resistant to the progress of the disease. Expansion of the Tubuli,—Sections of carious dentin cut parallelwith the long a

An atlas of human anatomy for students and physicians . Tubuli renalcs contorti -- ^Malpighian corpuscles ^ (.<.ir[uiscula renis (Malpighii) Interlobular or radiateartery/ ^ A. interlobularis. I First convoluted tubule I Tiibnlus renalis contortus -Glomerulus Capsule of theglomerulus (Bowmanscapsule)Capsula glomeruli-- Efferent vessel ofthe glomerulusVas tllercnsCapillary vessels Straight tubules Tubuli renalesrecti Afferent vessel of the glomerulus Vas afferens Interlobular or radiate arteryA. interlobularis Fig. 833.—Part of a Sfxtion through the CortexOF the Kidney in the direction of t Stock Photo

RM2AJAYY4–An atlas of human anatomy for students and physicians . Tubuli renalcs contorti -- ^Malpighian corpuscles ^ (.<.ir[uiscula renis (Malpighii) Interlobular or radiateartery/ ^ A. interlobularis. I First convoluted tubule I Tiibnlus renalis contortus -Glomerulus Capsule of theglomerulus (Bowmanscapsule)Capsula glomeruli-- Efferent vessel ofthe glomerulusVas tllercnsCapillary vessels Straight tubules Tubuli renalesrecti Afferent vessel of the glomerulus Vas afferens Interlobular or radiate arteryA. interlobularis Fig. 833.—Part of a Sfxtion through the CortexOF the Kidney in the direction of t

Principles and practice of operative dentistry . in the dentinal tubuli; theirsize would not permit their en-trance. Its size, the distinct andregular articulation of the rods, the absence of the zigzag windings, and its reaction to iodine, Miller thinksshould preclude it from being classed with the Leptothrix innominata, Leptothrix Buccalis Maxima.—Miller has given this name to a formof Leptothrix threads which he found in the mucous deposits upon theteeth. He describes the organism as having long, thick, straight or curvedfilaments, which show a marked resemblance in form to the Bacillus buc Stock Photo

RM2ANEKJB–Principles and practice of operative dentistry . in the dentinal tubuli; theirsize would not permit their en-trance. Its size, the distinct andregular articulation of the rods, the absence of the zigzag windings, and its reaction to iodine, Miller thinksshould preclude it from being classed with the Leptothrix innominata, Leptothrix Buccalis Maxima.—Miller has given this name to a formof Leptothrix threads which he found in the mucous deposits upon theteeth. He describes the organism as having long, thick, straight or curvedfilaments, which show a marked resemblance in form to the Bacillus buc

Principles and practice of operative dentistry . 290.—Longitudinal section of infected human dentin, showing the pipe-stem appearance of thetubules described by Tomes. (R. R. Andrews.). Fig. 291.—Infected human dentin. (V.A.Latham.) X 162.5. A, micro-organisms in the tubuli;B, B, micro-organisms in the interglobular spaces. Fig. 292.—Infected human dentin. (R. R. Andrews.) A, A, A, showing penetration of micro-organisms in the tubuli. Stock Photo

RM2ANE07W–Principles and practice of operative dentistry . 290.—Longitudinal section of infected human dentin, showing the pipe-stem appearance of thetubules described by Tomes. (R. R. Andrews.). Fig. 291.—Infected human dentin. (V.A.Latham.) X 162.5. A, micro-organisms in the tubuli;B, B, micro-organisms in the interglobular spaces. Fig. 292.—Infected human dentin. (R. R. Andrews.) A, A, A, showing penetration of micro-organisms in the tubuli.

Manual of human histology . .The testicles, testes, are a couple of true glands, containingwithin a special tunic, the tunica albuginea s. fibrosa, thesecreting elements, in the form of complexly convolutedtubules, the spermatic tubes or tubuli seminiferi. The tunic isa white, dense and thick membrane, corresponding in structure,in all respects, with other fibrous membranes (the dura materespecially), and everywhere surrounding the parenchyma of thetestis as a closed capsule. Its external surface, except Avherethe epididymis is attached to the testis, is rendered smooth andglistening by a spec Stock Photo

RM2AJ7EWG–Manual of human histology . .The testicles, testes, are a couple of true glands, containingwithin a special tunic, the tunica albuginea s. fibrosa, thesecreting elements, in the form of complexly convolutedtubules, the spermatic tubes or tubuli seminiferi. The tunic isa white, dense and thick membrane, corresponding in structure,in all respects, with other fibrous membranes (the dura materespecially), and everywhere surrounding the parenchyma of thetestis as a closed capsule. Its external surface, except Avherethe epididymis is attached to the testis, is rendered smooth andglistening by a spec

. Principles of human physiology : with their chief applications to pathology, hygiene, and forensic medicine : especially designed for the use of students. found in the kidneys of nearly allvertebrated animals. 668. The walls of the tubuli uriniferi are evi-Fig. 70. dently the parts in which the secretion takes place. When one of the ccecal extremities is ex-amined with a high power, its mucous membraneis found to be covered with a layer of nucleatedcells, forming an epithelium. 669. The embryological development of theUrinary organs in Vertebrated animals is a subjectof peculiar interest, ow Stock Photo

RM2AG880T–. Principles of human physiology : with their chief applications to pathology, hygiene, and forensic medicine : especially designed for the use of students. found in the kidneys of nearly allvertebrated animals. 668. The walls of the tubuli uriniferi are evi-Fig. 70. dently the parts in which the secretion takes place. When one of the ccecal extremities is ex-amined with a high power, its mucous membraneis found to be covered with a layer of nucleatedcells, forming an epithelium. 669. The embryological development of theUrinary organs in Vertebrated animals is a subjectof peculiar interest, ow

Handbook of archaeology, Egyptian - Greek - Etruscan - Roman . t with not only in theneighbourhood of Koine, but also throughout the Roman provincesin Europe, Asia, and Africa. They were apparent or subterranean.The latter, which sometimes traversed considerable space, and werecarried through rocks, contained pipes (fistulse, tubuli) of lead orterra cotta, frequently marked either with the name of the potter, orthe name of the consuls in whose time they were laid down. At con-venient points, in ihe course of these aqueducts, as it was necessaryfrom the water being conveyed through pipes, there Stock Photo

RM2AN7P2K–Handbook of archaeology, Egyptian - Greek - Etruscan - Roman . t with not only in theneighbourhood of Koine, but also throughout the Roman provincesin Europe, Asia, and Africa. They were apparent or subterranean.The latter, which sometimes traversed considerable space, and werecarried through rocks, contained pipes (fistulse, tubuli) of lead orterra cotta, frequently marked either with the name of the potter, orthe name of the consuls in whose time they were laid down. At con-venient points, in ihe course of these aqueducts, as it was necessaryfrom the water being conveyed through pipes, there

Carpenter's principles of human physiology . rana propria, and inner cells, nearer to the lumen. The innercells are generally arranged in more than two layers; they are polyhedral,possess a transparent spherical nucleus, and are separated from each other by aclear interstitial matrix, the germ reticulum. The cells present evidences ofundergoing rapid multiplication, and exhibit amoeboid movements. The con-volutions of the tubuli are so arranged that each lobule forms a sort of cone, theapex of which is directed towards the rete testis (b) ; and when they have reachedto within a line or two of Stock Photo

RM2AN3N0B–Carpenter's principles of human physiology . rana propria, and inner cells, nearer to the lumen. The innercells are generally arranged in more than two layers; they are polyhedral,possess a transparent spherical nucleus, and are separated from each other by aclear interstitial matrix, the germ reticulum. The cells present evidences ofundergoing rapid multiplication, and exhibit amoeboid movements. The con-volutions of the tubuli are so arranged that each lobule forms a sort of cone, theapex of which is directed towards the rete testis (b) ; and when they have reachedto within a line or two of

Carpenter's principles of human physiology . n; and the crustapetrosa, which invests the fang. On examining a thinlongitudinal section of a tooth the dentine is found,like the shaft of the long bones, to be hollowed outinto a pulp-cavity, containing a little connective tissue,with bloodvessels and nerves. These enter by aminute orifice at the extremity of the fang. Thedentine which surrounds the pulp-cavity is composedof a matrix, which is traversed by numerous tubuli,that radiate from the pulp-cavity towards the exter-nal surface of the tooth, and which pursue a gentlyundulating course, divid Stock Photo

RM2AN8966–Carpenter's principles of human physiology . n; and the crustapetrosa, which invests the fang. On examining a thinlongitudinal section of a tooth the dentine is found,like the shaft of the long bones, to be hollowed outinto a pulp-cavity, containing a little connective tissue,with bloodvessels and nerves. These enter by aminute orifice at the extremity of the fang. Thedentine which surrounds the pulp-cavity is composedof a matrix, which is traversed by numerous tubuli,that radiate from the pulp-cavity towards the exter-nal surface of the tooth, and which pursue a gentlyundulating course, divid

A system of human anatomy, general and special . red, globular bodies; these are the Malpighian bodies or glo-meruli. Each Malpighian body is about the TTjo of an inch in dia-meter, and is composed of a tuft of capillary vessels, enclosed withinthe extremity of an uriniferous tube, so that the number of Malpighianbodies corresponds with the number of tubuli uriniferi. The presenceof the capillary tuft necessarily produces a dilatation of the urinife-rous tube; beyond the tuft the tube presents a constriction, and thenassumes its proper diameter, namely, sjo °f an inch. Two-thirds of * A sectio Stock Photo

RM2AWFBKW–A system of human anatomy, general and special . red, globular bodies; these are the Malpighian bodies or glo-meruli. Each Malpighian body is about the TTjo of an inch in dia-meter, and is composed of a tuft of capillary vessels, enclosed withinthe extremity of an uriniferous tube, so that the number of Malpighianbodies corresponds with the number of tubuli uriniferi. The presenceof the capillary tuft necessarily produces a dilatation of the urinife-rous tube; beyond the tuft the tube presents a constriction, and thenassumes its proper diameter, namely, sjo °f an inch. Two-thirds of * A sectio

The obstetric memoirs and contributions of James YSimpson; . The internal organs of reproduction were, on the other hand,completely male. The two testicles (Fig. 22, g g) were situated inthe region of the pubis, and were scarcely clear of the inguinalrings. They were of the usual ovoid figure, and natural in size.They had internally the structure of the tubuli seminiferi, but it Fig. 23.. was not well developed. The spermatic cords were quite normalboth in regard to their composition and the origin and course oftheir bloodvessels. The right spermatic artery (Fig. 22, I) arose,as usual, from th Stock Photo

RM2AKCD79–The obstetric memoirs and contributions of James YSimpson; . The internal organs of reproduction were, on the other hand,completely male. The two testicles (Fig. 22, g g) were situated inthe region of the pubis, and were scarcely clear of the inguinalrings. They were of the usual ovoid figure, and natural in size.They had internally the structure of the tubuli seminiferi, but it Fig. 23.. was not well developed. The spermatic cords were quite normalboth in regard to their composition and the origin and course oftheir bloodvessels. The right spermatic artery (Fig. 22, I) arose,as usual, from th

A system of human anatomy, general and special . metimestwo ureters to one kidney. The ureter, the pelvis, the infundibula,and the calices are composed of two coats, an external or fibrouscoat, the tunica propria; and an internal mucous coat, which is con-tinuous with the mucous membrane of the bladder inferiorly, andwith the tubuli uriniferi above. Vessels and Nerves.—The renal artery is derived from the aorta;it divides into several large branches before entering the hilus, andwithin the organ ramifies in an arborescent manner, terminating innutrient twigs, and in the small inferent vessels Stock Photo

RM2AWFBCP–A system of human anatomy, general and special . metimestwo ureters to one kidney. The ureter, the pelvis, the infundibula,and the calices are composed of two coats, an external or fibrouscoat, the tunica propria; and an internal mucous coat, which is con-tinuous with the mucous membrane of the bladder inferiorly, andwith the tubuli uriniferi above. Vessels and Nerves.—The renal artery is derived from the aorta;it divides into several large branches before entering the hilus, andwithin the organ ramifies in an arborescent manner, terminating innutrient twigs, and in the small inferent vessels

Human physiology : designed for colleges and the higher classes in schools and for general reading . NERVES OF TOUCH IN THE SKIN OF THE THUMB. termination of the nerves as seen through the microscope ina thin perpendicular section of the skin in the thumb. Thethree eminences in this figure are those of the papilla, as theyare termed, which you can see are arranged in curvilinear rows,if you look at the ball of the thumb. In Fig. 79 you see thissame loop-like arrangement in the nervous tubuli, as seenthrough the microscope, on the sensitive sac that lines thecavity of a tooth, the entrance for Stock Photo

RM2AXJJFP–Human physiology : designed for colleges and the higher classes in schools and for general reading . NERVES OF TOUCH IN THE SKIN OF THE THUMB. termination of the nerves as seen through the microscope ina thin perpendicular section of the skin in the thumb. Thethree eminences in this figure are those of the papilla, as theyare termed, which you can see are arranged in curvilinear rows,if you look at the ball of the thumb. In Fig. 79 you see thissame loop-like arrangement in the nervous tubuli, as seenthrough the microscope, on the sensitive sac that lines thecavity of a tooth, the entrance for

RM2AWR340–The microscope and its revelations . Fig. 302. Perpendicular section of tooth of Lamna, moderatelyenlarged, showing network of medullary canals. Fig. 303. Transverse section of portion of tooth of Prisiis, morehighly magnified, showing orifices of medullary eanals, vnth systemsof radiating and inosculating tubuli. suiTounded by a system of tubuli (Fig, 303), which radiate into the surrounding solid substance. These tubuli, however, YT 2 692 YERTEBEATED ANIMALS. Fi&. 304.. do not enter lacunae, nor is there any concentric annulararrangement around the medullary canals; but each systemof tubuli

The Dental cosmos . tion hardens the dental tissue. It clings or sticks tothe tooth-substance, permeates the tubuli, excludes moisture, and preventsthe return of caries—hence its great value in the treatment of sensitivedentine, lining cavities and strengthening weak walls previous to the intro-duction of metallic fillings ; and, it being a non-conductor of thermal changes,prevents shock to the pulp. It is now regarded as a durable and permanentfilling-material when the proper mouths and positions are selected for itsinsertion. IN CROWN- AND BRIDGE-WORK, and porcelain inlays it has no superior Stock Photo

RM2AWE4GF–The Dental cosmos . tion hardens the dental tissue. It clings or sticks tothe tooth-substance, permeates the tubuli, excludes moisture, and preventsthe return of caries—hence its great value in the treatment of sensitivedentine, lining cavities and strengthening weak walls previous to the intro-duction of metallic fillings ; and, it being a non-conductor of thermal changes,prevents shock to the pulp. It is now regarded as a durable and permanentfilling-material when the proper mouths and positions are selected for itsinsertion. IN CROWN- AND BRIDGE-WORK, and porcelain inlays it has no superior

Principles and practice of operative dentistry . Section of root, parallel to dentinal canals. (After Stowell.) face the division is more rapid, and the size of the branches is correspond-ingly decreased. At the external surface of the dentin many of thetubules unite by anastomosis (Fig. 158), others terminate in the granularlayer of Purkinje and Tomes, while a third set penetrates the cementumand may unite with its lacunae through their canaliculi ; or enter theenamel by means of the open spaces, or interstices between the enaniel- Fig. 158.. 1, tubuli of dentin ; rods, already referred to as Stock Photo

RM2ANG21M–Principles and practice of operative dentistry . Section of root, parallel to dentinal canals. (After Stowell.) face the division is more rapid, and the size of the branches is correspond-ingly decreased. At the external surface of the dentin many of thetubules unite by anastomosis (Fig. 158), others terminate in the granularlayer of Purkinje and Tomes, while a third set penetrates the cementumand may unite with its lacunae through their canaliculi ; or enter theenamel by means of the open spaces, or interstices between the enaniel- Fig. 158.. 1, tubuli of dentin ; rods, already referred to as

. Relics of primeval life, beginning of life in the dawn of geological time. Fig. 30.—Casts of Canals of Eozoon, in Serpen.ine.Decalcified and highly magnified.. Fig. Tyi.— Grotip of finest Tubuli.Highly magnified, from a micro-photograph. 135 THE HISTORY OF A DISCOVERY 137 knew that no little labour must be devoted to thework and to its publication, and that some con-troversy might be expected. Mr. Billings, however,with his characteristic caution and modesty, de-clined. His hands, he said, were full of other work,and he had not specially studied the microscopicappearances of Foraminifera or Stock Photo

RM2AFJAHX–. Relics of primeval life, beginning of life in the dawn of geological time. Fig. 30.—Casts of Canals of Eozoon, in Serpen.ine.Decalcified and highly magnified.. Fig. Tyi.— Grotip of finest Tubuli.Highly magnified, from a micro-photograph. 135 THE HISTORY OF A DISCOVERY 137 knew that no little labour must be devoted to thework and to its publication, and that some con-troversy might be expected. Mr. Billings, however,with his characteristic caution and modesty, de-clined. His hands, he said, were full of other work,and he had not specially studied the microscopicappearances of Foraminifera or

. Human physiology. the existence of occasional blind extremities of the tubuli uriniferi—the result probably, he thinks, of arrested developement—states, thathe has never seen the ducts terminatein this way. He has described afibro-areolar framework, which, per-vading every part of the gland, andparticularly its cortical portion, per-forms the same office in the kidneyas the capsule of Glisson does inthe liver,—being a basis of supportto the delicate structure of the gland,conducting the bloodvessels throughthe organ, and constituting smallchambers in the cortical portion, ineach of which a s Stock Photo

RM2AFHF7H–. Human physiology. the existence of occasional blind extremities of the tubuli uriniferi—the result probably, he thinks, of arrested developement—states, thathe has never seen the ducts terminatein this way. He has described afibro-areolar framework, which, per-vading every part of the gland, andparticularly its cortical portion, per-forms the same office in the kidneyas the capsule of Glisson does inthe liver,—being a basis of supportto the delicate structure of the gland,conducting the bloodvessels throughthe organ, and constituting smallchambers in the cortical portion, ineach of which a s

General and dental pathology with special reference to etiology and pathologic anatomy; a treatise for students and practitioners . les tothe long axis of the tooth. The tubules follow the same relativedirection upon the labial and lingual and mesial and distal as-pects of the tooth in its entire length. In the incisal region, ifa mesiodistal section be examined, the tubuli will be found torun from the dentoenamel junction toward the pulp chamber ina fan-like arrangement. In molars and bicuspids the tubules form an arrangementsomething like this: Beginning at the enamel-cementum junctionand to Stock Photo

RM2AKKPDT–General and dental pathology with special reference to etiology and pathologic anatomy; a treatise for students and practitioners . les tothe long axis of the tooth. The tubules follow the same relativedirection upon the labial and lingual and mesial and distal as-pects of the tooth in its entire length. In the incisal region, ifa mesiodistal section be examined, the tubuli will be found torun from the dentoenamel junction toward the pulp chamber ina fan-like arrangement. In molars and bicuspids the tubules form an arrangementsomething like this: Beginning at the enamel-cementum junctionand to

Quain's elements of anatomy . has beentraced, nothing certain with regard to their nature can be stated. Itmay be remarked, however, that in sections of the foetal testis, the DUCTS OF THE TESTIS. 691 cells in question cannot be distinguished from the other cells of thedeveloping intertubular connective tissue. Similar cells are met with inthe stroma of the ovary. The capillaries form a close network over the walls of the semini-ferous tubules. Ducts of the testis.—As the convoluted tubuli seminiferi approachthe mediastinum testis they unite, as before said, with one another afcacute angles in Stock Photo

RM2ANHMDD–Quain's elements of anatomy . has beentraced, nothing certain with regard to their nature can be stated. Itmay be remarked, however, that in sections of the foetal testis, the DUCTS OF THE TESTIS. 691 cells in question cannot be distinguished from the other cells of thedeveloping intertubular connective tissue. Similar cells are met with inthe stroma of the ovary. The capillaries form a close network over the walls of the semini-ferous tubules. Ducts of the testis.—As the convoluted tubuli seminiferi approachthe mediastinum testis they unite, as before said, with one another afcacute angles in

Human physiology : designed for colleges and the higher classes in schools and for general reading . VERTICAL SECTION OF ENAMEL.FIG. 67.. ENAMEL.A, Transverse section. B, Separated prisms of it. 205. Perhaps the most wonderful exhibitions of the functionsof the cell are presented to us in the nervous system. Thenerves are bundles of tubes of exceeding fineness. They varyfrom TsVoth to o.oouth of an inch in diameter. Now, eachof these little tubes, or tubuli, as they are called, was once achain of cells. The cells in each chain or row, as the micros- 132 HUMAN PHYSIOLOGY. Stock Photo

RM2AXJT3E–Human physiology : designed for colleges and the higher classes in schools and for general reading . VERTICAL SECTION OF ENAMEL.FIG. 67.. ENAMEL.A, Transverse section. B, Separated prisms of it. 205. Perhaps the most wonderful exhibitions of the functionsof the cell are presented to us in the nervous system. Thenerves are bundles of tubes of exceeding fineness. They varyfrom TsVoth to o.oouth of an inch in diameter. Now, eachof these little tubes, or tubuli, as they are called, was once achain of cells. The cells in each chain or row, as the micros- 132 HUMAN PHYSIOLOGY.

The independent practitioner : a monthly journal, devoted to medicine, surgery, obstetrics, dentistry, pathology and popular science . NECK OF TOOTH. The outermost layer of dentine at the neck of the tooth is eithernormally without tubuli, or they are so fine as not to furnish soeasv an entrance to micro-orcranisms as the tubuli of dentine ingeneral. We therefore find in this region caries manifestingitself in a form somewhat different from that presented by den-tine in other positions. It is, moreover, here alone that we mayreadily obtain specimens of caries of dentine in its incipientstages. Stock Photo

RM2AWN0AA–The independent practitioner : a monthly journal, devoted to medicine, surgery, obstetrics, dentistry, pathology and popular science . NECK OF TOOTH. The outermost layer of dentine at the neck of the tooth is eithernormally without tubuli, or they are so fine as not to furnish soeasv an entrance to micro-orcranisms as the tubuli of dentine ingeneral. We therefore find in this region caries manifestingitself in a form somewhat different from that presented by den-tine in other positions. It is, moreover, here alone that we mayreadily obtain specimens of caries of dentine in its incipientstages.

The science and art of surgery : being a treatise on surgical injuries, diseases, and operations . change consists inan overgrowth of the epithelium of the tubuli seminiferi and epididjmis,which afterwards undergoes fatty degeneration; and others assertingthat the primary growth takes place between the tubuli, and that thechanges in the epithelium are secondary. The accompanying drawing (Fig. 850) represents a section of one ofthe small outlying nodules in the body of the gland, as described above.. Fig. 850.—Tubercular Testi.s. a. Tubuli seminiferi; h. Giant-cells (40 diam.). It will be seen Stock Photo

RM2AKJXYA–The science and art of surgery : being a treatise on surgical injuries, diseases, and operations . change consists inan overgrowth of the epithelium of the tubuli seminiferi and epididjmis,which afterwards undergoes fatty degeneration; and others assertingthat the primary growth takes place between the tubuli, and that thechanges in the epithelium are secondary. The accompanying drawing (Fig. 850) represents a section of one ofthe small outlying nodules in the body of the gland, as described above.. Fig. 850.—Tubercular Testi.s. a. Tubuli seminiferi; h. Giant-cells (40 diam.). It will be seen

Manual of human histology . 5. Vertical sectiou through aportion of a pyramid and the conical sub-stance belonging to it, of an injected Rab-bits kidney. The figure is half-diagram-matic ; X 30 diam. The vessels are represented on the left side, and on the rightthe course of the tubuli uriniferi: a, arterim inierlohulares, with the glomeruliMalpighiani, b, and their vasa efferentia; c, vasa efferentia : d, cortical capillaries;e, vasa efferentia of the outermost corpuscles, proceeding to the superficial capil-laries ; f, vasa efferentia of the innermost glomeruli, continuous with the arteriole Stock Photo

RM2AJ7HWW–Manual of human histology . 5. Vertical sectiou through aportion of a pyramid and the conical sub-stance belonging to it, of an injected Rab-bits kidney. The figure is half-diagram-matic ; X 30 diam. The vessels are represented on the left side, and on the rightthe course of the tubuli uriniferi: a, arterim inierlohulares, with the glomeruliMalpighiani, b, and their vasa efferentia; c, vasa efferentia : d, cortical capillaries;e, vasa efferentia of the outermost corpuscles, proceeding to the superficial capil-laries ; f, vasa efferentia of the innermost glomeruli, continuous with the arteriole

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