The elements of Embryology (1889) The elements of Embryology elementsofembryo00fostuoft Year: 1889 bout 0'09 mm.—the size of the ovum at the close jgmentation—to about 0'28 in diameter. It is en- osed by the zona radiata and the albuminous layer Fig. 96. :.] BLASTODERMIC VESICLE. 315 bAbbit's Ovum between 70—90 Hours after Impregnation. (After E. van Beneden.) V. cavity of blastodermic vesicle (yolk-sac); ep. outer layer; hy. inner mass ; Zp. albuminous envelope. mound it. The blastodermic vesicle continues to nlarge rapidly, and during the j)rocess the inner mass mdergoes important change
The elements of Embryology (1889) The elements of Embryology elementsofembryo00fostuoft Year: 1889 bout 0'09 mm.—the size of the ovum at the close jgmentation—to about 0'28 in diameter. It is en- osed by the zona radiata and the albuminous layer Fig. 96. :.] BLASTODERMIC VESICLE. 315 bAbbit's Ovum between 70—90 Hours after Impregnation. (After E. van Beneden.) V. cavity of blastodermic vesicle (yolk-sac); ep. outer layer; hy. inner mass ; Zp. albuminous envelope. mound it. The blastodermic vesicle continues to nlarge rapidly, and during the j)rocess the inner mass mdergoes important changes. It spreads out on the nner side of the outer layer and at the same time loses ts lens-like form and becomes flattened. The central
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