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RFHJ0B87–Darkfield light micrograph of Paramecium bursaria,a ciliate protozoan,that contains endosymbiotic green algae (Chlorella sp.).Paramecium are found mainly in stagnant ponds,feeding on bacteria plant particles.They have permanent mouth called oral grove.Food taken in through oral groove is digested
RF2C1CHJY–Campanella - Bell-animals - Large colony - 300 microns - Differential interference contrast
RM2FX58XK–Green animals. Animal chlorophyll. Old 19th century engraved illustration from La Nature 1893
RM2AGBMX6–. Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin. Fig. 16. Absteigende Periode. anläge und einen der Micronuclei, der durch die alten Macronucleus-trümmer verdeckt; nach einigen weiteren Teilungen (Fig. 19) istder neue Macronucleus wohl ausgebildet; hier liegt unter ihm nochgerade sichtbar der Micronucleus. Endomixis und ihre Bedeutung für die Infusorienzelle. 293 Prinzipiell sind hier dieselben Erscheinungen deutlich gewordenwie bei Paramaecium caudatum. Die Zahl der Generationen, nach derdie Reorganisation bei Paramaecium caudatum stattfindet, schwanktzwischen 90 und 10
RMPFYK46–. Fresh-water biology. Freshwater biology. Fig. 496. Frontonia leucas. V, vacuole. , canal; iV, macronucleus; «, micronucleus; X i6s. (After Calkins.) 86 (85) Ovate, flattened, rounded at each end. Mouth triangular or crescent- shaped, lateral, in front of the middle of the body. Glaucoma Ehrenberg. Representative species. Glaucoma scintillans Ehrenberg 1830. The vibratile membranes extending around the mouth pre- senting a bilabial appearance. Nucleus large, central. Con- tractile vacuole posterior. Length 75 ^t. Infusions. Fig. 497. Glaucoma scintillans. cv, contractile vacuole; macn, macro-
RMRWP6PW–Elements of biology, with special Elements of biology, with special reference to their rôle in the lives of animals elementsofbiolog00buch Year: 1933 70 ELEMENTS OF BIOLOGY MACRONUCLEUS MICRONUCLEUS
RMMA72CG–. The effects of inanition and malnutrition upon growth and structure . Fig. 4.—Paramecium after eight days of inanition. The characteristic crescent-shaped curvature of the body appears in this case. The macronucleus (N) and micronucleus (n) have emigrated to the anterior end of the body. Fig. 5.—Paramecium after nine days of inanition. The macronucleus has divided into two spheroidal bodies (N, N), the micronucleus (n) remaining undivided. Fig. 6.—Paramecium after twelve days of inanition, showing the degeneration vacuoles (d.v.), considered characteristic by Wallengren ('02) but not by Lips
RFCWDRYH–Colorful vector illustration of a single-celled paramecium with structures clearly labeled in separate key. All layers labeled.
RFHJ0B81–Phase contrast light micrograph of Paramecium.(Paramecium multimicronuleatum),a ciliate protozoan,with oral groove (right side of cell),no food vacuoles,two contractile vacuoles (left side of cell; no radiating channels),nucleus (centre) cilia.Paramecium are found mainly in stagnant ponds,feeding
RF2C1CHKC–Amoebe proteus / Chaos diffluens - Interchangeable Animals / Urtierchen - Focus on cell nucleus,pseudopodia and contractile vacuole - 800 microns - Differential interference contrast
RM2G6HXXD–Green animals. Animal chlorophyll. Old 19th century engraved illustration from La Nature 1893
RMRHK335–. The biology of Stentor. Stentor. Fig. 79. Photographs of S. coeruleus showing macronucleus as seen (A) in living stentor against dark field and (B) after feulgen staining to reveal intemodal connections.. 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 perfectly resemble the original work.. Tartar, Vance, 1911-. New York, Pergammon Press
RMPFK9DE–. Cytology. Cytology. Nuclear bou ndory Chromocenter Nucleoplasm Chromosome Figure 4-1. Schematic Representation of the Interphase Nucleus. Note as- sociation of parts of the chromosomes with the nuclear boundary and nucleolus. Nuclear Envelope There is considerable question as to whether or not the nuclear envelope is actually a semipermeable structure. The available evidence relating to its permeable properties does not preclude the passage. f 0.2/t Figure 4-2. Electron Micrograph of Section of Nuclear Envelope of Macronucleus of Poramecium multimicromicleatum. The nuclear envelope is a doub
RMRWP6G9–Elements of biology, with special Elements of biology, with special reference to their rôle in the lives of animals elementsofbiolog00buch Year: 1933 12 3 Fig. 19.—The 'trial and error' method of solving difficulties as illustrated by the attempts of a paramaecium to pass by an obstacle. (After Jennings: Behavior of the Lower Organisms. Columbia University Press.) Reproduction in Paramoecium. Paramcecium reproduces by binary fission (Fig. 20). Preceding division, the oral groove dis- appears. Both the macronucleus and the micronucleus elongate DIVISION PLANE—^ MACRONUCLEUS MICRONUCLEUS Fig
![. Fig. 30.—Balantidium Minutum. Fig. 31.—Nyctotherus Faba. n, nucleus; cv, contractile vacuole. (After mi.n, micro nucleus; ma.m, macronucleus. Schaudinn.) (After Schaudinn.) which follow. Vorticelli, which, according to Lindner, are said to infest man, cannot yet be recognized as parasitic structures. This embraces the principal protozoa which occur in man. We now come to the more highly-organized class, the plathelminthes or flat-worms. To this group, which embraces the two classes of trematodes, or sucking-worms, and cestodes, or tape-worms, belong the " vermes intestinalis " of t Stock Photo](https://c8.alamy.com/comp/MCK71D/fig-30balantidium-minutum-fig-31nyctotherus-faba-n-nucleus-cv-contractile-vacuole-after-min-micro-nucleus-mam-macronucleus-schaudinn-after-schaudinn-which-follow-vorticelli-which-according-to-lindner-are-said-to-infest-man-cannot-yet-be-recognized-as-parasitic-structures-this-embraces-the-principal-protozoa-which-occur-in-man-we-now-come-to-the-more-highly-organized-class-the-plathelminthes-or-flat-worms-to-this-group-which-embraces-the-two-classes-of-trematodes-or-sucking-worms-and-cestodes-or-tape-worms-belong-the-quot-vermes-intestinalis-quot-of-t-MCK71D.jpg ". Fig. 30.—Balantidium Minutum. Fig. 31.—Nyctotherus Faba. n, nucleus; cv, contractile vacuole. (After mi.n, micro nucleus; ma.m, macronucleus. Schaudinn.) (After Schaudinn.) which follow. Vorticelli, which, according to Lindner, are said to infest man, cannot yet be recognized as parasitic structures. This embraces the principal protozoa which occur in man. We now come to the more highly-organized class, the plathelminthes or flat-worms. To this group, which embraces the two classes of trematodes, or sucking-worms, and cestodes, or tape-worms, belong the " vermes intestinalis " of t Stock Photo")
RMMCK71D–. Fig. 30.—Balantidium Minutum. Fig. 31.—Nyctotherus Faba. n, nucleus; cv, contractile vacuole. (After mi.n, micro nucleus; ma.m, macronucleus. Schaudinn.) (After Schaudinn.) which follow. Vorticelli, which, according to Lindner, are said to infest man, cannot yet be recognized as parasitic structures. This embraces the principal protozoa which occur in man. We now come to the more highly-organized class, the plathelminthes or flat-worms. To this group, which embraces the two classes of trematodes, or sucking-worms, and cestodes, or tape-worms, belong the " vermes intestinalis " of t
RFCWDT02–Colorful vector illustration of single-celled paramecium with clearly labeled structures. All layers labeled for easy editing.
RFHJ0B80–DIC light micrograph of Paramecium.(Paramecium multimicronuleatum),a ciliate protozoan,with oral groove,food vacuoles,nucleus (left edge) cilia.Paramecium are found mainly in stagnant ponds,feeding on bacteria plant particles.They have permanent mouth called oral grove.Food taken in through oral
RMRHJY7B–. The biology of the Protozoa. Protozoa; Protozoa. 536 BIOLOGY OF THE PROTOZOA are formed and the old ones absorbed, has not been fully determined by observation but this appears to be the case in Urolcptus mobilis. The most important of the changes at this period have to do with the formation of the new macro- and micronuclei. The inaccurate statement is often made to the effect that the new macronucleus is formed by the metamorphosis of a micronucleus. This is strictly true only in cases of parthenogenesis. In fertilization both macro- and micronucleus are formed from products of the amphinu
RMPFYK0R–. Fresh-water biology. Freshwater biology. 189 (188) Zooids contracting together. Bodies very similar to Carchesium but central muscle continuous, causing all of the zooids to contract together. . Zoothamnium Stein. Representative species. . Zoothamnium adamsi Stokes 1885. Bodies about twice as long as broad, tapering to the pedicel; finely striated transversely. Length of zooids 60II. Reported from Niagara River. Attached to algae.. Fig. S43. Zoothamnium adamsi. cv, contractile vacuole; macn macronucleus. X lOO. (After Stokes.) 190 (187) Stalk not retractile 191. Please note that these images
RMRWPPJX–Elements of comparative zoology (1904) Elements of comparative zoology elementsofcompar1904king Year: 1904 FIG. 6.—A flagellate Infusorian, Chilimonas paramcecium (after Biitschli). n, nucleus; oe, oesophagus; v, contractile vac- uole. FIG. 7.—A ciliated Infusorian, Stylo- nichia mytilus, in process of division (after Stein), a, anus; cv, contractile vacuole; m, mouth; ma, macronucleus; mi, micronucleus; nm, new mouth. cases the conjugating individuals are equal in size and the union is temporary, the essential feature being an exchange of nuclear material. Here we have the lowest expression
RMMA76TJ–. Elementary biology; an introduction to the science of life . Fig. 129. Conjugation in Paramecium There are two nuclei: a, the small {mu-romicleus); and b, the large {macronucleus). A : Two individuals become attached and their micronuclei begin to divide. B: The half nuclei divide a second time. Of the four units resulting, three are called polar bodies, c, and the fourth is a germ nucleus, g, which again divides. C: The germ nuclei are interchanged, one of each pair passing over to the opposite animal. /?, completion of the inter- change. E^ same, further enlarged. F. the active germ nucleu
RFCWDT09–Colorful vector illustration of a single-celled Pet Paramecium with clearly labeled structures to make learning fun!
RMRDXBRY–. Protozoo?logy. Protozoa; Protozoa, Pathogenic. A TYPICAL LIFE CYCLE 105 the substance of the macronucleus. At each end of the infusorian is a bright spot which appears and disappears with considerable regular- ity; these are the contractile vacuoles, their function being to throw to the outside of the body the waste matters that are formed during the physiological activities of the cell. Each vacuole is supplied by a series of canals from various parts of the body, the waste matters in fluid form collecting in them to be emptied into the contractile vacuole and thence disposed of. The periph
RMPFYK3E–. Fresh-water biology. Freshwater biology. 114 (113) Without an undulating membrane in the peristome. Body purse- shaped, oblique in front; peristome funnel-shaped, open- ing on the ventral side by a slit reaching as far as the middle of the body. Membranellae on the left side of the peristome Bursaria Muller. Representative species. Bursaria truncatella Muller 1786. Nucleus band-like; contractile vacuoles numerous. Length soo to 700 li. Pond water. Fig. 511. Bursaria truncatella. cv, contractile vacuole; macn, macronucleus- X 35. (After Kent.) 115 (106) Peristome confined to the anterior bord
RMRWP6R1–Elements of biology, with special Elements of biology, with special reference to their rôle in the lives of animals elementsofbiolog00buch Year: 1933 MACRONUCLEUS MICRONUCLEUS ID. DIVISION OF EACH MICRONUCLEUS INTERCHANGE OF MICRONUCLEI FUSION OF MICRO- NUCLEI
RMMA72CF–. The effects of inanition and malnutrition upon growth and structure . I—cr. Figs, i to 6.—Paramecia in various stages of inanition. Figs, i to 5 from Lipska ('10); Fig. 6 from Wallengren ('02). Magnification about X400. b.g., buccal groove; c, cilia; cr, excretion crystals; d.v., degeneration vacuoles; ect., ectoplasm; end., endoplasm;/., fold in body; f.v., food vacuoles; TV, macronucleus; n, micronucleus. Fig. 1.—:Normal Paramecium caudalum of average dimensions. Fig. 2.—Paramecium after six days of inanition. The macronucleus (TV) is greatly enlarged, occupying the posterior half of the p
RMRN5NJ5–. Animal biology. Biology; Zoology; Physiology. SURVEY OF UNICELLULAR ANIMALS 55 Contractile vacuole, with canals Macronucleus Micronuclei Gastric vacuole Contractile vacuole Cilia Peristome Mouth Gullet astric vacuole together constitute the nucleus of the cell, and represent a sort of physiological division of labor of the chromatin complex. But it is in the cytoplasm that specialization is most conspicuous. Not only are there general differentiations into ectoplasm and endoplasm, but these regions also have local specializations such as thousands of hair-like, vibratile cilia for loco- moti
RMPFYK3G–. Fresh-water biology. Freshwater biology. CILIATE PROTOZOA (INFUSORIA) 28s. 114 (113) Without an undulating membrane in the peristome. Body purse- shaped, oblique in front; peristome funnel-shaped, open- ing on the ventral side by a slit reaching as far as the middle of the body. Membranellae on the left side of the peristome Bursaria Muller. Representative species. Bursaria truncatella Muller 1786. Nucleus band-like; contractile vacuoles numerous. Length soo to 700 li. Pond water. Fig. 511. Bursaria truncatella. cv, contractile vacuole; macn, macronucleus- X 35. (After Kent.) 115 (106) Peris
RMRWP6G8–Elements of biology, with special Elements of biology, with special reference to their rôle in the lives of animals elementsofbiolog00buch Year: 1933 >»>â 12 3 Fig. 19.âThe 'trial and error' method of solving difficulties as illustrated by the attempts of a paramaecium to pass by an obstacle. (After Jennings: Behavior of the Lower Organisms. Columbia University Press.) Reproduction in Paramoecium. Paramcecium reproduces by binary fission (Fig. 20). Preceding division, the oral groove dis- appears. Both the macronucleus and the micronucleus elongate DIVISION PLANEâ^
RMRDXBK9–. Protozoo?logy. Protozoa; Protozoa, Pathogenic. MORE COMPLICATED LIFE CYCLES 129 divisions were frequent. Toward the end of June, however, when the A series nearly died out in the 620th generation, the conditions were very different. Fig. 26, left, is from a specimen in the 615th generation; its size is below the normal; its endoplasm is choked up with granules, and there is no trace of vacuoles save the contractile vacuole near one end. The macronucleus is definitely granular, and its contour is irregular, as though devoid of nuclear membrane. The micronucleus is elongate and spindle-formed.
RMPFYK3B–. Fresh-water biology. Freshwater biology. Fig. 512. Stentor polymorpkus. cv, contractile vacuole; macn, macronucleus. X 30. (After Kent.) iig (116) Posterior end produced into a tail-like process; anterior region helmet-Hke, rounded anteriorly with a free posterior margin. Mouth ventral in a ciliated groove. Cilia extending from the mouth in a spiral across the anterior border and around the free margin of the anterior portion. Caenomorpha Perty. Representative species. Caenomorpha medusula Perty 1849.. Movements swift, rotating on the long axis. 100 to 130 ji. Standing water. Fig. 513. Caeno
RMT1J0CM–Diseases of metabolism and of Diseases of metabolism and of the blood, animal parasites, toxicology diseasesofmetabo00cabo Year: 1906 Fig. 30.—Balantidium Minutum. Fig. 31.—Nyctotherus Faba. n, nucleus; cv, contractile vacuole. (After mi.n, micro nucleus; ma.m, macronucleus. Schaudinn.) (After Schaudinn.) which follow. Vorticelli, which, according to Lindner, are said to infest man, cannot yet be recognized as parasitic structures. This embraces the principal protozoa which occur in man. We now come to the more highly-organized class, the plathelminthes or flat-worms. To this group, which em
![. Zoölogy [microform] : descriptive and practical. Zoology; Zoologie. 294 Descriptive Zoology. be seen to contract at tolerably frequent intervals, appar- ently discharging liquid to the exterior. Around each of these " contractile vacuoles " is a series of radiating canals. After the vacuole has become obliterated by emptying its contents, it is gradually filled again by these surrounding canals, which get watery material from the various parts of the body. Thus certain waste material is thrown out. The Nucleus. — Paramecium has two nuclei, a larger body called the macronucleus and Stock Photo](https://c8.alamy.com/comp/RENCJR/zology-microform-descriptive-and-practical-zoology-zoologie-294-descriptive-zoology-be-seen-to-contract-at-tolerably-frequent-intervals-appar-ently-discharging-liquid-to-the-exterior-around-each-of-these-quot-contractile-vacuoles-quot-is-a-series-of-radiating-canals-after-the-vacuole-has-become-obliterated-by-emptying-its-contents-it-is-gradually-filled-again-by-these-surrounding-canals-which-get-watery-material-from-the-various-parts-of-the-body-thus-certain-waste-material-is-thrown-out-the-nucleus-paramecium-has-two-nuclei-a-larger-body-called-the-macronucleus-and-RENCJR.jpg ". Zoölogy [microform] : descriptive and practical. Zoology; Zoologie. 294 Descriptive Zoology. be seen to contract at tolerably frequent intervals, appar- ently discharging liquid to the exterior. Around each of these " contractile vacuoles " is a series of radiating canals. After the vacuole has become obliterated by emptying its contents, it is gradually filled again by these surrounding canals, which get watery material from the various parts of the body. Thus certain waste material is thrown out. The Nucleus. — Paramecium has two nuclei, a larger body called the macronucleus and Stock Photo")
RMRENCJR–. Zoölogy [microform] : descriptive and practical. Zoology; Zoologie. 294 Descriptive Zoology. be seen to contract at tolerably frequent intervals, appar- ently discharging liquid to the exterior. Around each of these " contractile vacuoles " is a series of radiating canals. After the vacuole has become obliterated by emptying its contents, it is gradually filled again by these surrounding canals, which get watery material from the various parts of the body. Thus certain waste material is thrown out. The Nucleus. — Paramecium has two nuclei, a larger body called the macronucleus and
![. A manual of zoology. Zoology. IV. CILIATA 193. Fig. 151.—Conjugation in ParamcBcium. k, macronucleus; k/?, micronudeus; 0, cyto- stomes. I. Changes of micronudeus; left siclvle stage, right spindle stage. II. Second division of micronudeus; into primary spindles (i, 5) and secondary spindles (2, 3, 4; 6, 7, 8). III. Degeneration of secondary spindles (2, 3, 4; 6, 7, 8); di'ision of primary spindle nto male (i"f, ^m) and female spindles (iiti', 5^). IV. Exchange of male spindles nearly complete (fertilization), one end still in the parent animal, the other united with the female spindle Stock Photo](https://c8.alamy.com/comp/PG3PEE/a-manual-of-zoology-zoology-iv-ciliata-193-fig-151conjugation-in-paramcbcium-k-macronucleus-k-micronudeus-0-cyto-stomes-i-changes-of-micronudeus-left-siclvle-stage-right-spindle-stage-ii-second-division-of-micronudeus-into-primary-spindles-i-5-and-secondary-spindles-2-3-4-6-7-8-iii-degeneration-of-secondary-spindles-2-3-4-6-7-8-diision-of-primary-spindle-nto-male-iquotf-m-and-female-spindles-iiti-5-iv-exchange-of-male-spindles-nearly-complete-fertilization-one-end-still-in-the-parent-animal-the-other-united-with-the-female-spindle-PG3PEE.jpg ". A manual of zoology. Zoology. IV. CILIATA 193. Fig. 151.—Conjugation in ParamcBcium. k, macronucleus; k/?, micronudeus; 0, cyto- stomes. I. Changes of micronudeus; left siclvle stage, right spindle stage. II. Second division of micronudeus; into primary spindles (i, 5) and secondary spindles (2, 3, 4; 6, 7, 8). III. Degeneration of secondary spindles (2, 3, 4; 6, 7, 8); di'ision of primary spindle nto male (i"f, ^m) and female spindles (iiti', 5^). IV. Exchange of male spindles nearly complete (fertilization), one end still in the parent animal, the other united with the female spindle Stock Photo")
RMPG3PEE–. A manual of zoology. Zoology. IV. CILIATA 193. Fig. 151.—Conjugation in ParamcBcium. k, macronucleus; k/?, micronudeus; 0, cyto- stomes. I. Changes of micronudeus; left siclvle stage, right spindle stage. II. Second division of micronudeus; into primary spindles (i, 5) and secondary spindles (2, 3, 4; 6, 7, 8). III. Degeneration of secondary spindles (2, 3, 4; 6, 7, 8); di'ision of primary spindle nto male (i"f, ^m) and female spindles (iiti', 5^). IV. Exchange of male spindles nearly complete (fertilization), one end still in the parent animal, the other united with the female spindle
RMRWP5N9–Elements of biology, with special Elements of biology, with special reference to their rôle in the lives of animals elementsofbiolog00buch Year: 1933 UNICELLULAR FORMS 6^ (Fig. 17), may be examined in detail to illustrate the specializations that appear as one goes from the simple amoeba to more advanced types. It is found in great numbers in decaying vegetable matter and is easily cultivated in the laboratory. If a handful of dry grass ENDOSARC CONTRACTILE VACUOLE ORAL GROOVE CONTRACTILE VACUOLE PELLICLE CILIA ECTOSARC MACRONUCLEUS MICRONUCLEUS GULLET CYTOSTOME FOOD VACUOLE Fig. 17.—^Para
![. The biology of the protozoa. Protozoa; Protozoa. 58 BIOLOGY OF THE PROTOZOA distinguished from other substances of the resting nucleus by their color reactions to basic and acidic dyes. Sometimes the chromo- meres or chromioles are apparently suspended in a more or less definite "linin" reticulum which is recognized as being a coagulation product of the colloidal ground substance or karyolymph. In other. Fig. 27.—Origin of macronucleus after conjugation in Uroleptus mobilis. (1) First metagamic mitosis of the amphinucleus; (2) one of the progeny of this division dividing again; (3) Stock Photo](https://c8.alamy.com/comp/RHK4FJ/the-biology-of-the-protozoa-protozoa-protozoa-58-biology-of-the-protozoa-distinguished-from-other-substances-of-the-resting-nucleus-by-their-color-reactions-to-basic-and-acidic-dyes-sometimes-the-chromo-meres-or-chromioles-are-apparently-suspended-in-a-more-or-less-definite-quotlininquot-reticulum-which-is-recognized-as-being-a-coagulation-product-of-the-colloidal-ground-substance-or-karyolymph-in-other-fig-27origin-of-macronucleus-after-conjugation-in-uroleptus-mobilis-1-first-metagamic-mitosis-of-the-amphinucleus-2-one-of-the-progeny-of-this-division-dividing-again-3-RHK4FJ.jpg ". The biology of the protozoa. Protozoa; Protozoa. 58 BIOLOGY OF THE PROTOZOA distinguished from other substances of the resting nucleus by their color reactions to basic and acidic dyes. Sometimes the chromo- meres or chromioles are apparently suspended in a more or less definite "linin" reticulum which is recognized as being a coagulation product of the colloidal ground substance or karyolymph. In other. Fig. 27.—Origin of macronucleus after conjugation in Uroleptus mobilis. (1) First metagamic mitosis of the amphinucleus; (2) one of the progeny of this division dividing again; (3) Stock Photo")
RMRHK4FJ–. The biology of the protozoa. Protozoa; Protozoa. 58 BIOLOGY OF THE PROTOZOA distinguished from other substances of the resting nucleus by their color reactions to basic and acidic dyes. Sometimes the chromo- meres or chromioles are apparently suspended in a more or less definite "linin" reticulum which is recognized as being a coagulation product of the colloidal ground substance or karyolymph. In other. Fig. 27.—Origin of macronucleus after conjugation in Uroleptus mobilis. (1) First metagamic mitosis of the amphinucleus; (2) one of the progeny of this division dividing again; (3)
![. Adventures with animals and plants. Biology. • Fig. 89 Three aiuebae photographed through a 7/ncroscope. Can you see food vacuoles in the lowest one? The living material streams in all directions, (general biological supply). l"iG. 90 Living Paramecium photographed through a microscope. The outline is blurred by the moveme7it of the cilia. Can you see the groove leading to the mouth? (hugh spencer) Front end Contractile vocuole Macronucleus Mouth. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and a Stock Photo](https://c8.alamy.com/comp/RR26XB/adventures-with-animals-and-plants-biology-fig-89-three-aiuebae-photographed-through-a-7ncroscope-can-you-see-food-vacuoles-in-the-lowest-one-the-living-material-streams-in-all-directions-general-biological-supply-lquotig-90-living-paramecium-photographed-through-a-microscope-the-outline-is-blurred-by-the-moveme7it-of-the-cilia-can-you-see-the-groove-leading-to-the-mouth-hugh-spencer-front-end-contractile-vocuole-macronucleus-mouth-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-a-RR26XB.jpg ". Adventures with animals and plants. Biology. • Fig. 89 Three aiuebae photographed through a 7/ncroscope. Can you see food vacuoles in the lowest one? The living material streams in all directions, (general biological supply). l"iG. 90 Living Paramecium photographed through a microscope. The outline is blurred by the moveme7it of the cilia. Can you see the groove leading to the mouth? (hugh spencer) Front end Contractile vocuole Macronucleus Mouth. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and a Stock Photo")
RMRR26XB–. Adventures with animals and plants. Biology. • Fig. 89 Three aiuebae photographed through a 7/ncroscope. Can you see food vacuoles in the lowest one? The living material streams in all directions, (general biological supply). l"iG. 90 Living Paramecium photographed through a microscope. The outline is blurred by the moveme7it of the cilia. Can you see the groove leading to the mouth? (hugh spencer) Front end Contractile vocuole Macronucleus Mouth. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and a
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 184 E. L. POWERS, C. F. EHRET AND L. E. ROTH *. FIGURE 1. Phase contrast photograph of surface of compressed specimen of P. aitrclia showing size of body of trichocyst relative to head in living condition. 1000 X. in, mitochondrion ; me, macronucleus ; mem, macronuclear membrane ; mt, mitochondria! tubule; n, nucleolus; p, pore of mitochondrial tubule; pi, pellicle; pt, plastic; s, peritubular space; tb, trichocyst body; tc, trichocyst cap; th, trichocyst head; ts, trichocyst shaft ("exploded").. Please note that t Stock Photo](https://c8.alamy.com/comp/RHNYMH/the-biological-bulletin-biology-zoology-biology-marine-biology-184-e-l-powers-c-f-ehret-and-l-e-roth-figure-1-phase-contrast-photograph-of-surface-of-compressed-specimen-of-p-aitrclia-showing-size-of-body-of-trichocyst-relative-to-head-in-living-condition-1000-x-in-mitochondrion-me-macronucleus-mem-macronuclear-membrane-mt-mitochondria!-tubule-n-nucleolus-p-pore-of-mitochondrial-tubule-pi-pellicle-pt-plastic-s-peritubular-space-tb-trichocyst-body-tc-trichocyst-cap-th-trichocyst-head-ts-trichocyst-shaft-quotexplodedquot-please-note-that-t-RHNYMH.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 184 E. L. POWERS, C. F. EHRET AND L. E. ROTH *. FIGURE 1. Phase contrast photograph of surface of compressed specimen of P. aitrclia showing size of body of trichocyst relative to head in living condition. 1000 X. in, mitochondrion ; me, macronucleus ; mem, macronuclear membrane ; mt, mitochondria! tubule; n, nucleolus; p, pore of mitochondrial tubule; pi, pellicle; pt, plastic; s, peritubular space; tb, trichocyst body; tc, trichocyst cap; th, trichocyst head; ts, trichocyst shaft ("exploded").. Please note that t Stock Photo")
RMRHNYMH–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 184 E. L. POWERS, C. F. EHRET AND L. E. ROTH *. FIGURE 1. Phase contrast photograph of surface of compressed specimen of P. aitrclia showing size of body of trichocyst relative to head in living condition. 1000 X. in, mitochondrion ; me, macronucleus ; mem, macronuclear membrane ; mt, mitochondria! tubule; n, nucleolus; p, pore of mitochondrial tubule; pi, pellicle; pt, plastic; s, peritubular space; tb, trichocyst body; tc, trichocyst cap; th, trichocyst head; ts, trichocyst shaft ("exploded").. Please note that t
RMRGTTG8–. Bulletin biologique de la France et de la Belgique. Biology; Natural history. 468 G. CÃPÃDE ET E. POYARKOFF. même Cepedella. Elles sont assez souvent placées au voisinage immédiat du macronucleus. Ces formations sont peut-être des produits d'excrétion, peut-être aussi des substances de réserve. Noyaux. â Nous avons pu étudier la structure du macronucleus et du micronucleus avec une très grande précision de détails. Les méthodes qui nous ont permis ces observations sont : la fixation à l'aide du sublimé acétique selon la formule de Gilson, le sublimé alcoolique de Schaudinn et
RM2AJ0YCX–Outlines of zoology . complished, the Infusorians separate, andnuclear reconstruction begins. The fertilised micronucleus divides intotwo (F), and each half divides again (G), so that there are four in eachcell. Two of these form the macronuclei of the two daughter-cellsinto which the Infusprian proceeds to divide (H); the other two formthe micronuclei, but before another division occurs each has againdivided. Thus each daughter-cell contains a macronucleus and twomicronuclei. Fifth Type of Protozoa—Vorticella Vorticella, or the bell-animalcule, is a type of thoseciliated Infusorians in which
RM2AJF7BR–The cell in development and inheritance . age-nucleus of the ovum, then gives rise by division to both macronucleiand micronuclei of the offspring of the conjugating animals (Fig. 109). These facts may be illustrated by the conjugation of ParamoEciiimcmidatum, which possesses a single macronucleus and micronucleus,and in which conjugation is temporary and fertilization mutual. Thetwo animals become united by their ventral sides and the macronu-cleus of each begins to degenerate, while the micronucleus dividestwice to form four spindle-shaped bodies (Fig. no. A, B). Three ofthese degenerate, fo
RM2AKAF34–General physiology; an outline of the science of life . During conjugation the macronucleus perishes,disintegrating and dissolving in the protoplasm. If the Paramce-cium be a form possessing one micronucleus, such as Parametriumcaudatum, where the relations are simplest, the micronucleus ineach individual divides twice in succession, so that four partialnuclei arise. Three of these likewise dissolve in the protoplasm, 202 GENERAL PHYSIOLOGY but the fourth divides once more in each individual, and onehalf (the male nucleus) passes over the protoplasmic bridgeinto the other individual, so that e
RM2AN4TX2–Opalina : its anatomy and reproduction, with a decription of infection experiments and a chronological review of the literature . ion, but it does suggest that the substance ofthe chromatin spherules may find its way into the endoplasmicspherules. This, is rendered still more probable by the fact mentionedthat in Hoplitophrya apparently similar refractive spherules arise inthe macronucleus and in the scattered groups of macronuclear gra-nules when the macronucleus fragments, Eefractive spherules somewhat comparable to those in the endo-sarc of Opalina are not rare among the Ciliata, Nydotherus
RM2ANH1GT–The Journal of experimental zoology . imder normal size which was swallowed andshortly after disgorged by animal shown in figure 13. 15 A cannibal in early fission stage containing the bodies of sixteen ingestedanimals, thirteen of which show in the figure (dorsal view) (Del. hem. only). 16 An individual, descendant of a cannibal in the first generation, showingthe presence of the bodies of three ingested animals. The vacuole to the right^of the fused macronucleus of the cannibal shows the macronuclei of one ingestedanimal (dorsal view) (p. 491). 17 An individual, descendant of a cannibal in t
RM2AWEJDA–An introduction to the study of the comparative anatomy of animals . ?am iiS^ ^ Fig. 41. Paramecium caudaiuvt. A, a view of the entire animal; w, mouth; aft,anus; cv, contractile vacuole in diastole; ci/, contractile vacuole insystole ; jna, macronucleus ; vii, micronucleus. B, the hinder portion ofthe same animal more highly magnified to show the mouth leading by afunnel-shaped gullet into the endoplasm; a food vacuole is forming at theextremity of the gullet ; uin, undulating membrane ; an, anus; tr,trichocysts. The arrows indicate the direction of the flow of the granulesin the endoplasm. C
RM2AGBNE9–. Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin. Fig. 15. Absteigende Periode. 292 Rh. Erdmann. von denen sich vier zu Macronucleusanlagen umwandeln. Dienächstfolgenden Teilungen (Fig. 18) stellen schließlich die normaleParamaecium-ZeWe wieder her. Hier haben wir eine Macronucleus-. Fig. 16. Absteigende Periode. anläge und einen der Micronuclei, der durch die alten Macronucleus-trümmer verdeckt; nach einigen weiteren Teilungen (Fig. 19) istder neue Macronucleus wohl ausgebildet; hier liegt unter ihm nochgerade sichtbar der Micronucleus. Endomixis und ihre Bedeutung für d
RM2AGBPGF–. Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin. Fig. 13. Absteigende Periode. Wir sehen hier den Macronucleus mit dem einen, für Paramaeciumcaudatum charakteristischen Micronucleus. Er beginnt, alle jeneAnordnungen des Chromatins zu zeigen, wie sie Calkins 1904 beider Konjugation beschrieb. Schließlich noch, ehe der Macronucleuszerstört ist, findet die Ausbildung (Fig. 14) der ersten sog. Re-duktionsteilung statt, die bekannte Hantelfigur ist hier deutlich zu 290 Rh. Erdmann. sehen. Auf die erste sog. Reduktionsteilung folgt die zweite. Wirsehen auf der nächsten Figur (
RM2AGBTTP–. Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin. i Fig. 9. Aufsteigende Periode.Xach der ersten Zellteilung. 286 Rh. Erdmann. caryons unterbleibt. Der Vorgang ist also nicht als Autogamieaufzufassen. Weiter unterscheidet er sich von dem bei der Konjugationdadurch, daß im allgemeinen die Aufteilung des Macronucleus nichtdurch die Bildung von wurstförmigen Schlingen geschieht, sondernder Macronucleus stößt Chromatinkörper aus. Doch ist dieser Unter-schied nicht von prinzipieller Bedeutung. Die alleinigen Kriterien,ob ein Vorgang als Endomixis aufzufassen ist, sind folgende
![The cell in development and inheritance . Fig. 38. — Mitotic division in Infusoria. [R. Hertwig.] A-C. Macronucleus of Spirochona, sliowing pole-plates. D-H. Successive stages in thedivision of the micronucleus of/ta^-flWAT/ww. D. The earliest stage, showing reticulum. G. Fol-lowing stage ( sickle-form ) with nucleolus. E. Chromosomes and pole-plates. F. Late ana-phase. H. Final phase. the nuclear membrane may persist more or less completely throughevery stage {Noctihica, EiiglypJia, ActinospJicEriiini). 2. Asters maybe present (Hehozoa, gregarines) or wanting (In-fusoria, Radiolaria). 3. In o Stock Photo](https://c8.alamy.com/comp/2AJGM97/the-cell-in-development-and-inheritance-fig-38-mitotic-division-in-infusoria-r-hertwig-a-c-macronucleus-of-spirochona-sliowing-pole-plates-d-h-successive-stages-in-thedivision-of-the-micronucleus-ofta-flwatww-d-the-earliest-stage-showing-reticulum-g-fol-lowing-stage-sickle-form-with-nucleolus-e-chromosomes-and-pole-plates-f-late-ana-phase-h-final-phase-the-nuclear-membrane-may-persist-more-or-less-completely-throughevery-stage-noctihica-eiiglypjia-actinospjiceriiini-2-asters-maybe-present-hehozoa-gregarines-or-wanting-in-fusoria-radiolaria-3-in-o-2AJGM97.jpg "The cell in development and inheritance . Fig. 38. — Mitotic division in Infusoria. [R. Hertwig.] A-C. Macronucleus of Spirochona, sliowing pole-plates. D-H. Successive stages in thedivision of the micronucleus of/ta^-flWAT/ww. D. The earliest stage, showing reticulum. G. Fol-lowing stage ( sickle-form ) with nucleolus. E. Chromosomes and pole-plates. F. Late ana-phase. H. Final phase. the nuclear membrane may persist more or less completely throughevery stage {Noctihica, EiiglypJia, ActinospJicEriiini). 2. Asters maybe present (Hehozoa, gregarines) or wanting (In-fusoria, Radiolaria). 3. In o Stock Photo")
RM2AJGM97–The cell in development and inheritance . Fig. 38. — Mitotic division in Infusoria. [R. Hertwig.] A-C. Macronucleus of Spirochona, sliowing pole-plates. D-H. Successive stages in thedivision of the micronucleus of/ta^-flWAT/ww. D. The earliest stage, showing reticulum. G. Fol-lowing stage ( sickle-form ) with nucleolus. E. Chromosomes and pole-plates. F. Late ana-phase. H. Final phase. the nuclear membrane may persist more or less completely throughevery stage {Noctihica, EiiglypJia, ActinospJicEriiini). 2. Asters maybe present (Hehozoa, gregarines) or wanting (In-fusoria, Radiolaria). 3. In o
RM2AGBPTA–. Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin. Fig. 13. Absteigende Periode. Wir sehen hier den Macronucleus mit dem einen, für Paramaeciumcaudatum charakteristischen Micronucleus. Er beginnt, alle jeneAnordnungen des Chromatins zu zeigen, wie sie Calkins 1904 beider Konjugation beschrieb. Schließlich noch, ehe der Macronucleuszerstört ist, findet die Ausbildung (Fig. 14) der ersten sog. Re-duktionsteilung statt, die bekannte Hantelfigur ist hier deutlich zu 290 Rh. Erdmann. sehen. Auf die erste sog. Reduktionsteilung folgt die zweite. Wirsehen auf der nächsten Figur (
RM2AGBXKB–. Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin. Fig. 4. Absteigende Periode. 21* 282 Rh. Erdmann. Prozesses mit den Rhythmen feststellen kann (Fig. 3). Alle Kulturenwaren Zweigkulturen von Woodruffs seit 1909 geführten Haupt-kultur, die A hieß; von ihr zweigten wir sechs Seitenkulturen ab M,die einzeln weiter geführt wurden.. Fig. 5. Absteigende Periode. Untersuchen wir nun die Tiere kurz vor dem Tiefstand derTeilungskurve, so finden wir, daß der Macronucleus ein grobkörnigesAussehen hat. Dies zeigt den Beginn des Reorganisationsprozesses Endomixis und ihre Bedeutung fü
RM2AGBP05–. Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin. eine Zerstückelung des Macronucleus zuerst in größeren Teilen statt(Fig. 16); aber das Endprodukt (Fig. 17) ist dasselbe; auf derFigur sehen wir einen einzigen reduzierten Micronucleus, der durchseine helle Farbe kenntlich ist. Er liegt noch umgeben von einemgrößeren Brocken des Macronucleus, mit unzähligen kleinen Chro- Endomixis und ihre Bedeutung für die Infusorienzeile. 291 matinbrocken zusammen, welche die Zelle füllen. Von diesemeinen Micronucleus geht, wie wir auf der nächsten Figur sehen, dieKeorganisation der Zell
RM2AGDTTY–. Bulletin du Muséum national d'histoire naturelle. Chez Palœmon Potiuna, qui vit dans les eaux courantes au Brésil, les cinqpremières paires de pattes abdominales sont fonctionnelles dès la naissance, ce quipermet à la jeune larve de lutter contre le courant qui tend à lentraîner, lors-quelle ne se maintient pas fixée à un support par les griffes terminales desmaxillipèdes. — 55 — nismes. Il exisle constamment un micronucléus sphérique, accompagnantun gros macronucléus très développé relativement à la masse du cyto-plasme; aucun autre point ne fixe le colorant. Chez certains individus, lemacr
RM2AGBWPP–. Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin. s bleibt nicht unverändert. Er teilt sich in acht Teil-produkte; hierbei kommt es zur Bildung von kleinen, kurzen Spindeln.In dem nächsten Tier (Fig. 5) sehen Sie 8 Micronuclei, zahlreichein die Zelle verstreute Chromatinbrocken und die fast von Chro- 284 Rh. Erdmann. matin entleerte Membran des Macronucleus. Ist das Infusor indiesem Zustand, so verliert es für einige Zeit seine Teilfähigkeit.Nach 36 Stunden für gewöhnlich beginnt es sich zu teilen, nach-dem von den acht Micronuclei sechs oder sieben verschwunden sind.Die
RM2AWMX0X–Mires de la Soci zoologique de France . atoire continu (fig. II). Le cercle ciliaire péristomientrès réduit forme une courtespire, plutôt un cei-cle. Les cils,en général immobiles, ne sonten mouveuient que lorsquelanimal reste immobile, mou-vement absolument indépen-dant de lactivité de la vacuolecontractile et du vestibule, nepouvant donc être interprétécomme une action passive dueau courant provoqué par léva-cuation de leau au moment de leur contraction. La vacuole contractile, très dilatable, souvre à la base duvestibule par un très court canal. Le macronucléus^ moniliforme, sétent dans lax
RM2CE27TK–. Biology . Fig. 27.—Paramecium caudahim in the condition of depression and recoverythrough the use of salts. The individual on the left has densely packed proto-plasm, the others were similar individuals which were treated with potassiumphosphate. From photographs of prepared specimens. Reproduction.—^Like Amoeba proteus and the flagellates,Paramecium reproduces by simple division, the micronucleusdividing first. The cell divides transversely through themiddle of the macronucleus which is passively divided with therest of the cell (Fig. 28). One new mouth and new contractilevacuoles are forme
RM2CEEY6A–. Pathogenic micro-organisms, including bacteria and Protozoa; a practical manual for students, physicians and health officers. Bitlantidiuni coli: 1, 2, stages of division; 3, conjugation. (After Leuckart.) organoid structures which receive the food, some have definitemouth openings, indeed, and definite places for excreting waste })rod-ucts. The food vacuoles may contain acid or alkaline digestiveproducts. The nuclear material is difterentiated into two forms, alarge macronucleus and a much snudler micronucleus. The functionof the macronucleus is supposed to be vegetative, and that of themic
RMRHK154–. The biology of the protozoa. Protozoa; Protozoa. PHENOMENA ACCOMPANYING FERTILIZATION 313 whether or not new cirri, membranelles, and undulating membranes are formed and the old ones absorbed, has not been fully determined by observation but this appears to be the case in Uroleptus mobilis. The most important of the changes at this period have to do with the formation of the new macro- and micronuclei. The inaccurate statement is often made to the effect that the new macronucleus is formed by the metamorphosis of a micronucleus. This is strictly true only in cases of parthenogenesis. In fert
RMRHP80E–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 4. Ciliospores at the beginning of the peduncle's formation, showing the appearance of the macronucleus before the first division. FIG. 5. First cleavage of the ciliospore, giving the terminal macrozooid / and the median microzooid A. The figure shows the differential division of the macro- nucleus (figured by dotting) and the apparently equal division of the micronucleus (black—spindle stage). FIG. 6. Later stage of the first cleavage, showing the terminal macrozooid / and the median microzooid A; macronucleus figured
![. Animal behaviour. Animals behavior. /JTiimflinuidiMi Fig. 1.—Paramecium.. the particles into and down the tube, and on reaching its iuner end these particles burst through into the semi-fluid sub- stance, and circulate therein. Just above the funnel there are two bean-like bodies, the larger of which is known as the macronucleus, the smaller as the micronucleus. The process of multiplication is by "fission," or the division of each Paramecium into two similar animalcules. Not infrequently, however, two Paramecia may be seen to approach each other and come together, funnel to funnel Stock Photo](https://c8.alamy.com/comp/RN6W8M/animal-behaviour-animals-behavior-jtiimflinuidimi-fig-1paramecium-the-particles-into-and-down-the-tube-and-on-reaching-its-iuner-end-these-particles-burst-through-into-the-semi-fluid-sub-stance-and-circulate-therein-just-above-the-funnel-there-are-two-bean-like-bodies-the-larger-of-which-is-known-as-the-macronucleus-the-smaller-as-the-micronucleus-the-process-of-multiplication-is-by-quotfissionquot-or-the-division-of-each-paramecium-into-two-similar-animalcules-not-infrequently-however-two-paramecia-may-be-seen-to-approach-each-other-and-come-together-funnel-to-funnel-RN6W8M.jpg ". Animal behaviour. Animals behavior. /JTiimflinuidiMi Fig. 1.—Paramecium.. the particles into and down the tube, and on reaching its iuner end these particles burst through into the semi-fluid sub- stance, and circulate therein. Just above the funnel there are two bean-like bodies, the larger of which is known as the macronucleus, the smaller as the micronucleus. The process of multiplication is by "fission," or the division of each Paramecium into two similar animalcules. Not infrequently, however, two Paramecia may be seen to approach each other and come together, funnel to funnel Stock Photo")
RMRN6W8M–. Animal behaviour. Animals behavior. /JTiimflinuidiMi Fig. 1.—Paramecium.. the particles into and down the tube, and on reaching its iuner end these particles burst through into the semi-fluid sub- stance, and circulate therein. Just above the funnel there are two bean-like bodies, the larger of which is known as the macronucleus, the smaller as the micronucleus. The process of multiplication is by "fission," or the division of each Paramecium into two similar animalcules. Not infrequently, however, two Paramecia may be seen to approach each other and come together, funnel to funnel
RMRHKAJ4–. Biology. Biology. FIG. 27.—Paramecium caudatum in the condition of depression and recovery through the use of salts. The individual on the left has densely packed proto- plasm, the others were similar individuals which were treated with potassium phosphate. From photographs of prepared specimens. Reproduction.—Like * Amoeba proteus and the flagellates, Paramecium reproduces by simple division, the micronucleus dividing first. The cell divides transversely through the middle of the macronucleus which is passively divided with the rest of the cell (Fig. 28). One new mouth and new contractile v
RMRE1BWK–. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. 696 Balantidium Coli There are two nuclei. The larger, or macronucleus, is bean-shaped, kidney- shaped, or, more rarely, oval. The smaller, the micronucleus, is sphericaL There is no digestive tube; the nutritious particles are directly in the endosarc, in which they are digested, any residuum being extruded from the anus. Motility.—The organism is actively motile, swimming rapidly at a steady pace or darting here and there. Staining.—The organism can be
RMRHP9MT–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE NEUROMOTOR APPARATUS OF CIILAMYDODOX SP. 479 shows it imbedded in the anterior end of the macronucleus. It is quite small, and some of my preparations show it at the posterior end of the macronucleus, and some at the side. It cannot be seen in all preparations. THE NEUROMOTOR APPARATUS The first part of the neuromotor apparatus to be observed was a system of fibers around the mouth or oral opening, Figs. 2, 6, 7. As described above, the pharyngeal basket in Clihnnydodon is very large and heavy, and the circular myoneme a
RMRN5NH8–. Animal biology. Biology; Zoology; Physiology. 5<5 ANIMAL BIOLOGY In this necessarily cursory survey of the Protozoa, at least one major point must be forced upon our attention — the versatility of form and function exhibited by these unicellular animals — their adaptation to many and varied modes of life in the most diverse environmental conditions. But their unicellular plan of structure, permitting only cytological differentiation, has obvious Micronucleus Gullet Micronucleus Gullet. Contractile vacuole -' -li=£ Macronucleus s^- Contractile vacuole (?O^S&Sk Contractile vacuole fgs-
RMRJCX30–. Cell heredity. Cytogenetics. ment from each parent. Each fusion nucleus divides twice, producing four diploid nuclei, two of which remain as micronuciei, and two of which enlarge, becoming the new macronuclei. The micronuciei divide once more so that upon cell division each daughter has one macronucleus and two micronuciei.. 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 perfectly resemble the original work.. Sager, Ruth; Ryan, Francis J. (Francis Joseph), 19
RMRHP7HD–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 31. Prorodon griseus in the early completion of the permanent cyst with all the organs in tact. FIG. 32. Later stage of encystment with the disappearance of the cilia and the breaking up of the pharynx. The micronucleus and the contractile vacuole(?) persist. The macronucleus is in its early stage of metamorphosis, c. v., contractile vacuole. FIG. 33. The macronucleus in its later stage of metamorphosis. Several cytoplasmic vacuoles are present. FIG. 34. Final stages of metamorphosis of macronucleus or cytoplasmic reorg
RMRE1YT3–. A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians. Bacteriology; Pathogenic bacteria; Protozoa. Balantidmm Diarrhea 653 organism is watched these large clear spaces can be seen alternately to contract and expand. There are two nuclei. The larger, or macronucleus, is bean-shaped, kidney- shaped, or, more rarely, oval. The smaller, the micronucleus, is spherical. There is no digestive tube; the nutritious particles are directly in the endosarc, in which they are digested, any residuum being extruded from the anus. Motility.—The organism is actively m
![. Adventures with animals and plants. Biology. l"iG. 90 Living Paramecium photographed through a microscope. The outline is blurred by the moveme7it of the cilia. Can you see the groove leading to the mouth? (hugh spencer) Front end Contractile vocuole Macronucleus Mouth. Cilia Fig. 91 This drawing of a Paramecium shows the groove through which food enters. How does the food get to this spot? What does a parcrmecium eat? How does it move?. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance Stock Photo](https://c8.alamy.com/comp/RR26X1/adventures-with-animals-and-plants-biology-lquotig-90-living-paramecium-photographed-through-a-microscope-the-outline-is-blurred-by-the-moveme7it-of-the-cilia-can-you-see-the-groove-leading-to-the-mouth-hugh-spencer-front-end-contractile-vocuole-macronucleus-mouth-cilia-fig-91-this-drawing-of-a-paramecium-shows-the-groove-through-which-food-enters-how-does-the-food-get-to-this-spot-what-does-a-parcrmecium-eat-how-does-it-move-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-RR26X1.jpg ". Adventures with animals and plants. Biology. l"iG. 90 Living Paramecium photographed through a microscope. The outline is blurred by the moveme7it of the cilia. Can you see the groove leading to the mouth? (hugh spencer) Front end Contractile vocuole Macronucleus Mouth. Cilia Fig. 91 This drawing of a Paramecium shows the groove through which food enters. How does the food get to this spot? What does a parcrmecium eat? How does it move?. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance Stock Photo")
RMRR26X1–. Adventures with animals and plants. Biology. l"iG. 90 Living Paramecium photographed through a microscope. The outline is blurred by the moveme7it of the cilia. Can you see the groove leading to the mouth? (hugh spencer) Front end Contractile vocuole Macronucleus Mouth. Cilia Fig. 91 This drawing of a Paramecium shows the groove through which food enters. How does the food get to this spot? What does a parcrmecium eat? How does it move?. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance
