Embryonic stem cells Black & White Stock Photos
RMDAK0WM–HANDOUT - An undated scanning electron microscope handout picture from the Max Planck Institute for Molecular Biomedicine shows embryonic stem cells of mice in Muenster, Germany. Numerous scientists at the institute of the University of Muenster are involved in stem cell research. Photo: Mpi Muenster
RF2WP90HT–Cells color line icon. Organisation in organism. Vector isolated element. Editable stroke.
RMRE0RN6–. An introduction to vegetable physiology. Plant physiology. GEOWTH 313 by permanent change of form. It is the process of passing from the embryonic to the adult condition. We must not assume that every increase of bulk is necessarily growth; for, as we shall see, in growing cells and members there is a constant stretching of the cell or tissue by hydrostatic. FiQ. 135.^PoETioN OF Seotion of Stem or Rush, showing Stellate Tissue of the Pith, with Lauge Intekoellulab Spaces. pressure or turgidity, which can be distinguished from growth by the fact that it can be removed, the result being a cert
![. The British Charophyta. Characeae. 42 BRITISH CHAROPHYTA. and rudimentary branchlets are produced, there are a large number of starch-bearing cells similar to those of -which bulbils are composed. The thickened stem-. Fio. 15.—Symmetrical star-like stem-bulbils of Nitellopsis oitusa. i. View of upper surface showing pro-embryonic branches and rhizoids originating at the base of metamorphosed branchlets (after Giesenhagen). ii, iii, iv. Various forms of "stars" (ii after H. Groves ; iii, iv after Migula). ( y 7.) nodes give rise to numerous rhizoids, and often to accessory pro-embry Stock Photo](https://c8.alamy.com/comp/PG1JT2/the-british-charophyta-characeae-42-british-charophyta-and-rudimentary-branchlets-are-produced-there-are-a-large-number-of-starch-bearing-cells-similar-to-those-of-which-bulbils-are-composed-the-thickened-stem-fio-15symmetrical-star-like-stem-bulbils-of-nitellopsis-oitusa-i-view-of-upper-surface-showing-pro-embryonic-branches-and-rhizoids-originating-at-the-base-of-metamorphosed-branchlets-after-giesenhagen-ii-iii-iv-various-forms-of-quotstarsquot-ii-after-h-groves-iii-iv-after-migula-y-7-nodes-give-rise-to-numerous-rhizoids-and-often-to-accessory-pro-embry-PG1JT2.jpg ". The British Charophyta. Characeae. 42 BRITISH CHAROPHYTA. and rudimentary branchlets are produced, there are a large number of starch-bearing cells similar to those of -which bulbils are composed. The thickened stem-. Fio. 15.—Symmetrical star-like stem-bulbils of Nitellopsis oitusa. i. View of upper surface showing pro-embryonic branches and rhizoids originating at the base of metamorphosed branchlets (after Giesenhagen). ii, iii, iv. Various forms of "stars" (ii after H. Groves ; iii, iv after Migula). ( y 7.) nodes give rise to numerous rhizoids, and often to accessory pro-embry Stock Photo")
RMPG1JT2–. The British Charophyta. Characeae. 42 BRITISH CHAROPHYTA. and rudimentary branchlets are produced, there are a large number of starch-bearing cells similar to those of -which bulbils are composed. The thickened stem-. Fio. 15.—Symmetrical star-like stem-bulbils of Nitellopsis oitusa. i. View of upper surface showing pro-embryonic branches and rhizoids originating at the base of metamorphosed branchlets (after Giesenhagen). ii, iii, iv. Various forms of "stars" (ii after H. Groves ; iii, iv after Migula). ( y 7.) nodes give rise to numerous rhizoids, and often to accessory pro-embry
RMDAK0TY–HANDOUT - An undated scanning electron microscope handout picture from the Max Planck Institute for Molecular Biomedicine shows embryonic stem cells of a mouse in Muenster, Germany. Numerous scientists at the institute of the University of Muenster are involved in stem cell research. Photo: Mpi Muenster
RMRDW9N7–. Plants; a text-book of botany. Botany. 284 PLANT STKUCTUEES below tliem are the three embryonic regions, dermatogen, periblem, and plerome; and farther below these three regions pass into permanent tissue, organizing the epider- mis, cortex, and stele. The three embryonic regions are usually not so distinct in the Conifer stem as in the Dico- tyl stem, but both stems have epidermis, cortex, and stele. Epidermis.—The epidermis is a protective layer, whose cells do not become so much modified but that they may be regarded as parenchyma. It gives rise also to super- ficial parts, as hairs, etc.
RMPFXC00–. Wood; a manual of the natural history and industrial applications of the timbers of commerce. Wood; Timber. BUNDLES AND PITH-EAYS 9 other cases, as in the Oak, the cells of the pith have their walls thickened, and turn from white to brown; but even then its rela- tively minute width makes it difficult to detect in a stem several years of age. The procamUum strands extend, from the rudiments of leaves near its apex, right through the stem into tiie root. They get their name from a Latin word, cambio, to grow, being in a merely transi- tory or embryonic condition. In Monocotyledons the whole o
RMRDJ32A–. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. PLANT DEVELOPMENT. 23 ' by the. name Parthenogenesis (Gr. parthenos, virgin, genesis, parent- age), or Virgin Parentage. There is no reason why the little Proto- coccus mother should be denied the distinction of womanhood merely because she remains forever in the embryonic condition. This mode is also called Oemmiparous (Gr. gemma, bud or bulb, pario, I bring forth); the daughter-cells being compared to the gems (stem-bulbs) of the Lily and Onion. This is not an accurate t
![. The British Charophyta. Characeae. 42 BRITISH CHAROPHYTA. and rudimentary branchlets are produced, there are a large number of starch-bearing cells similar to those of -which bulbils are composed. The thickened stem-. Fio. 15.—Symmetrical star-like stem-bulbils of Nitellopsis oitusa. i. View of upper surface showing pro-embryonic branches and rhizoids originating at the base of metamorphosed branchlets (after Giesenhagen). ii, iii, iv. Various forms of "stars" (ii after H. Groves ; iii, iv after Migula). ( y 7.) nodes give rise to numerous rhizoids, and often to accessory pro-embry Stock Photo](https://c8.alamy.com/comp/RD9PGX/the-british-charophyta-characeae-42-british-charophyta-and-rudimentary-branchlets-are-produced-there-are-a-large-number-of-starch-bearing-cells-similar-to-those-of-which-bulbils-are-composed-the-thickened-stem-fio-15symmetrical-star-like-stem-bulbils-of-nitellopsis-oitusa-i-view-of-upper-surface-showing-pro-embryonic-branches-and-rhizoids-originating-at-the-base-of-metamorphosed-branchlets-after-giesenhagen-ii-iii-iv-various-forms-of-quotstarsquot-ii-after-h-groves-iii-iv-after-migula-y-7-nodes-give-rise-to-numerous-rhizoids-and-often-to-accessory-pro-embry-RD9PGX.jpg ". The British Charophyta. Characeae. 42 BRITISH CHAROPHYTA. and rudimentary branchlets are produced, there are a large number of starch-bearing cells similar to those of -which bulbils are composed. The thickened stem-. Fio. 15.—Symmetrical star-like stem-bulbils of Nitellopsis oitusa. i. View of upper surface showing pro-embryonic branches and rhizoids originating at the base of metamorphosed branchlets (after Giesenhagen). ii, iii, iv. Various forms of "stars" (ii after H. Groves ; iii, iv after Migula). ( y 7.) nodes give rise to numerous rhizoids, and often to accessory pro-embry Stock Photo")
RMRD9PGX–. The British Charophyta. Characeae. 42 BRITISH CHAROPHYTA. and rudimentary branchlets are produced, there are a large number of starch-bearing cells similar to those of -which bulbils are composed. The thickened stem-. Fio. 15.—Symmetrical star-like stem-bulbils of Nitellopsis oitusa. i. View of upper surface showing pro-embryonic branches and rhizoids originating at the base of metamorphosed branchlets (after Giesenhagen). ii, iii, iv. Various forms of "stars" (ii after H. Groves ; iii, iv after Migula). ( y 7.) nodes give rise to numerous rhizoids, and often to accessory pro-embry
![. Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. CONIPERALES 105 to note that in Ephedra, even in the same species (^E. campylo- poda), both conditions are found. Strasburger ^* records a remarkable embryonic structure in C^phalotaxus Fortunei and Araucaria Brasiliana. The stem tip, instead of being absolutely terminal, is covered by a small group or layer of cells which is soon thrown off, but seems for a time to serve as an organ of penetration and protection, finding its analogue in the root cap (Figs. 80, 81). The presence of this terminal group is repo Stock Photo](https://c8.alamy.com/comp/RE2HF8/morphology-of-spermatophytes-part-i-gymnosperms-gymnosperms-plant-morphology-coniperales-105-to-note-that-in-ephedra-even-in-the-same-species-e-campylo-poda-both-conditions-are-found-strasburger-records-a-remarkable-embryonic-structure-in-cphalotaxus-fortunei-and-araucaria-brasiliana-the-stem-tip-instead-of-being-absolutely-terminal-is-covered-by-a-small-group-or-layer-of-cells-which-is-soon-thrown-off-but-seems-for-a-time-to-serve-as-an-organ-of-penetration-and-protection-finding-its-analogue-in-the-root-cap-figs-80-81-the-presence-of-this-terminal-group-is-repo-RE2HF8.jpg ". Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. CONIPERALES 105 to note that in Ephedra, even in the same species (^E. campylo- poda), both conditions are found. Strasburger ^* records a remarkable embryonic structure in C^phalotaxus Fortunei and Araucaria Brasiliana. The stem tip, instead of being absolutely terminal, is covered by a small group or layer of cells which is soon thrown off, but seems for a time to serve as an organ of penetration and protection, finding its analogue in the root cap (Figs. 80, 81). The presence of this terminal group is repo Stock Photo")
RMRE2HF8–. Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. CONIPERALES 105 to note that in Ephedra, even in the same species (^E. campylo- poda), both conditions are found. Strasburger ^* records a remarkable embryonic structure in C^phalotaxus Fortunei and Araucaria Brasiliana. The stem tip, instead of being absolutely terminal, is covered by a small group or layer of cells which is soon thrown off, but seems for a time to serve as an organ of penetration and protection, finding its analogue in the root cap (Figs. 80, 81). The presence of this terminal group is repo
![. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. 16 THE PLANT: ITS STRUCTURE, LIFE-PROCESSES AND ENVIRONMENT which remain alive after the sieve cells are apparently dead; their function is not clearly understood. In dicotyledonous plants, between the wood and the bast is found the cambium, an embryonic tissue that forms new cells whose growth causes the stem to thicken year by year. The inner part of this growth becomes wood, which adds an "annual ring." These rings are clearly marked, because t Stock Photo](https://c8.alamy.com/comp/RDPD6H/cyclopedia-of-farm-crops-a-popular-survey-of-crops-and-crop-making-methods-in-the-united-states-and-canada-farm-produce-agriculture-16-the-plant-its-structure-life-processes-and-environment-which-remain-alive-after-the-sieve-cells-are-apparently-dead-their-function-is-not-clearly-understood-in-dicotyledonous-plants-between-the-wood-and-the-bast-is-found-the-cambium-an-embryonic-tissue-that-forms-new-cells-whose-growth-causes-the-stem-to-thicken-year-by-year-the-inner-part-of-this-growth-becomes-wood-which-adds-an-quotannual-ringquot-these-rings-are-clearly-marked-because-t-RDPD6H.jpg ". Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. 16 THE PLANT: ITS STRUCTURE, LIFE-PROCESSES AND ENVIRONMENT which remain alive after the sieve cells are apparently dead; their function is not clearly understood. In dicotyledonous plants, between the wood and the bast is found the cambium, an embryonic tissue that forms new cells whose growth causes the stem to thicken year by year. The inner part of this growth becomes wood, which adds an "annual ring." These rings are clearly marked, because t Stock Photo")
RMRDPD6H–. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. 16 THE PLANT: ITS STRUCTURE, LIFE-PROCESSES AND ENVIRONMENT which remain alive after the sieve cells are apparently dead; their function is not clearly understood. In dicotyledonous plants, between the wood and the bast is found the cambium, an embryonic tissue that forms new cells whose growth causes the stem to thicken year by year. The inner part of this growth becomes wood, which adds an "annual ring." These rings are clearly marked, because t
RMRE1WPJ–. Fundamentals of botany. Botany. GROWTH 121 embryonic parts within the bud begin to enlarge and this helps to force the bud-scales apart. The young stem-in- ternodes rapidly elongate, the petioles of the leaves in- crease in length, and gradually the leaf-blades expand. Fig. 8o.—Sapling of horse-chestnut {Msculus Hippocastanum), with young leaves not yet wholly expanded. (Cf. Fig. 79.) (Photo by the author.) as their cells become more and more turgid (Figs. 79 and 80). 123. Permanent and Temporary Growth.—The size finally attained by stems, roots, leaves, and other parts is usually permanent;
RMRD8XXW–. Wood; a manual of the natural history and industrial applications of the timbers of commerce. Wood; Timber. BUNDLES AND PITH-EAYS 9 other cases, as in the Oak, the cells of the pith have their walls thickened, and turn from white to brown; but even then its rela- tively minute width makes it difficult to detect in a stem several years of age. The procamUum strands extend, from the rudiments of leaves near its apex, right through the stem into tiie root. They get their name from a Latin word, cambio, to grow, being in a merely transi- tory or embryonic condition. In Monocotyledons the whole o
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