The elements of embryology (1883) The elements of embryology elementsofembryo00fost Year: 1883 X.] BLASTODEEMIC VESICLE. 315 about 0'09 mm.—the size of the ovum at the close segmentation—to about 0'28 in diameter. It is en- closed by the zona radiata and the albuminous layer Fig. 96. Eabbit's Ovum between 70—90 Hours after Impregnation. (After E. van Beneden.) hv. cavity of blastodermic vesicle (jolk-sac); ep. outer layer; hy. inner mass ; Zp. albuminous envelope. around it. The blastodermic vesicle continues to enlarge rapidly, and during the process the inner mass undergoes important cha
The elements of embryology (1883) The elements of embryology elementsofembryo00fost Year: 1883 X.] BLASTODEEMIC VESICLE. 315 about 0'09 mm.—the size of the ovum at the close segmentation—to about 0'28 in diameter. It is en- closed by the zona radiata and the albuminous layer Fig. 96. Eabbit's Ovum between 70—90 Hours after Impregnation. (After E. van Beneden.) hv. cavity of blastodermic vesicle (jolk-sac); ep. outer layer; hy. inner mass ; Zp. albuminous envelope. around it. The blastodermic vesicle continues to enlarge rapidly, and during the process the inner mass undergoes important changes. It spreads out on the inner side of the outer layer and at the same time loses its lens-like form and becomes flattened. The central
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