. Analysis of development. Embryology; Embryology. FOREBRAIN EYE HINDBRAIN CORD. Fig. 116. Axial differentiation of central nervous system. A, Results of transplants or excisions from the axial keel of Fundulus (after Oppenheimer, '36b, Fig. 21). B, Results of inductions by three levels of the archenteron roof of Salmo, associated with extraembryonic ectoderm (after Eakin, '39, Fig. 1). C, Results of transplantation of parts of the unincubated chick blastoderm to the chorioallantois (Butler, '35). D, Explantation of pieces of the chick blastoderm: pre-groove primitive streak stage (Spratt, '42
. Analysis of development. Embryology; Embryology. FOREBRAIN EYE HINDBRAIN CORD. Fig. 116. Axial differentiation of central nervous system. A, Results of transplants or excisions from the axial keel of Fundulus (after Oppenheimer, '36b, Fig. 21). B, Results of inductions by three levels of the archenteron roof of Salmo, associated with extraembryonic ectoderm (after Eakin, '39, Fig. 1). C, Results of transplantation of parts of the unincubated chick blastoderm to the chorioallantois (Butler, '35). D, Explantation of pieces of the chick blastoderm: pre-groove primitive streak stage (Spratt, '42). E, Localization of central nervous system levels in the definitive primitive streak stage of the chick (data from Hunt, '32; Clarke, '36); chorioallantoic transplantation. F, Same for the head-process stage (from Clarke, '36; Rawles, '36). lateral axis of the eye-forming area; the localization of histogenetic potency lags be- hind morphogenetic localization. Ultimately the ability to differentiate retina is localized in the optic vesicle areas, shortly before they themselves become morphologically patent. In the definitive primitive streak and head-process stages, transplantation experi- ments reveal anteroposterior axiation of the future medullary plate (Fig. 116E,F), with. 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 Willier, Benjamin H. (Benjamin Harrison), b. 1890. Philadelphia, Saunders
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Keywords: ., bookcentury1900, bookpublisherphiladelphi, booksubjectembryology
