A Text-book of Embryology: For Students of MedicineSaunders, 1902 - 405 pages |
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Page 24
... mammals . The following classification of ova by Balfour is based upon the arrangement of these constituents : 1. Alecithal ova are those in which the protoplasm and AP ts Ksch --n.d . -b.d -n.d -える。 VP FIG . 5. - Diagram of an egg ...
... mammals . The following classification of ova by Balfour is based upon the arrangement of these constituents : 1. Alecithal ova are those in which the protoplasm and AP ts Ksch --n.d . -b.d -n.d -える。 VP FIG . 5. - Diagram of an egg ...
Page 42
... mammals , they have been studied also and have been found to agree with the former in all essential respects . Certain modifications dependent upon the relations and proportions of formative - yolk and food - yolk will be pointed out ...
... mammals , they have been studied also and have been found to agree with the former in all essential respects . Certain modifications dependent upon the relations and proportions of formative - yolk and food - yolk will be pointed out ...
Page 43
... mammals ( Fig . 4 ) and of amphioxus , to the segmen- tation of which the above description may be said to apply . Strictly speaking , the cells are not of exactly equal size , those in the region of the vegetative pole of the egg being ...
... mammals ( Fig . 4 ) and of amphioxus , to the segmen- tation of which the above description may be said to apply . Strictly speaking , the cells are not of exactly equal size , those in the region of the vegetative pole of the egg being ...
Page 44
... mammalian ovum ( Allen Thomson , after van Beneden ) . 4. Diagram illustrating the relation of the primary layers of the blasto- derm , the segmentation - cavity of this stage corresponding with the archenteron of amphioxus ( Bonnet ) ...
... mammalian ovum ( Allen Thomson , after van Beneden ) . 4. Diagram illustrating the relation of the primary layers of the blasto- derm , the segmentation - cavity of this stage corresponding with the archenteron of amphioxus ( Bonnet ) ...
Page 45
... mammals , reaches the uterus . As a peculiarity of the mammalian ovum , the blastula now increases greatly in size , the cleav- age - cavity becoming dilated . The zona pellucida , which still surrounds the ovum , is by this time quite ...
... mammals , reaches the uterus . As a peculiarity of the mammalian ovum , the blastula now increases greatly in size , the cleav- age - cavity becoming dilated . The zona pellucida , which still surrounds the ovum , is by this time quite ...
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Common terms and phrases
adult allantois amnion aorta artery becomes begins blood-vessels body-cavity body-wall bone brain cardinal vein cartilage cartilaginous cavity cells chorda chorion choroid clefts Cloth connective tissue connective-tissue constitute cord differentiation diverticulum dorsal ectoderm Edition embryo embryonic area epithelial epithelium evagination fetal fetus fibers fissure folds follicle fore-brain fossa fourth ganglion genital glands groove growth gut-tract hind-brain human embryo inner inter-brain intestine lateral layer ligament liver lobe lower mammals median Medical medullary membrane mesentery mesoderm mesodermic tissue mesothelium nasal nasofrontal nerve octavo olfactory optic cup optic vesicle organ orifice ossification outer ovary ovum parietal peritoneum pharyngeal placenta plate posterior primitive segments primitive streak produced region retina ridge septum side sinus somatopleure somites spinal splanchnopleure stage structure surface Surgery thickened tion transverse trunk tube tubules umbilical undergoes upper uterus vascular ventral wall ventricle vertebrates vessels villi visceral arches vitelline duct vitelline veins week Wolffian duct yolk-sac
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