A system of obstetrics . Fig. 96.—(After Wiedersheim.) Ep, epiblast, invaginated at f to line medullary groove; V, cav-ity of fore-brain (third ventricle;; BSP, cells of optic vesicle; InJ, commencement of infun-dibulum; L, epiblast cells from which the lens is developed later. Fig. 97.—Diagram: op, cavity of primary optic vesicle, nearly obliterated by the infolding of itsepiblast to form the optic cup; os, cavity of optic cup; b, epiblast of posterior half of pri-mary optic vesicle which will form the pigmentary layer of the retina; a, involuted epiblastof anterior half of primary optic vesi
A system of obstetrics . Fig. 96.—(After Wiedersheim.) Ep, epiblast, invaginated at f to line medullary groove; V, cav-ity of fore-brain (third ventricle;; BSP, cells of optic vesicle; InJ, commencement of infun-dibulum; L, epiblast cells from which the lens is developed later. Fig. 97.—Diagram: op, cavity of primary optic vesicle, nearly obliterated by the infolding of itsepiblast to form the optic cup; os, cavity of optic cup; b, epiblast of posterior half of pri-mary optic vesicle which will form the pigmentary layer of the retina; a, involuted epiblastof anterior half of primary optic vesicle : it gives origin to most of the retina; I, commence-ment of the lens; me, mesoblast; ep, external epiblast. the primary optic vesicle doubles back on itself (Fig. 97), so as tonearly obliterate its original cavity, op, and form a new one, the second- Fig. 98.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
