Elementary text-book of zoology (1884) Elementary text-book of zoology elementarytextbo0201clau Year: 1884 DEYEUH'.MEXT. 295 a M 079.—Diagramatic figures illustrating the formation of the fatal membranes 01 a Mammal (;ifter Kolliker). a, Ovum with first rudiments of embryo; b, Ovum wirh yolk-sac developing amnion ; c, Ovum with amniou closing and developing allautois; <l, Ovum with villous serous envelope, embryo with mouth and anus ; r, Ovum in which the vascular layer of the allantois is applied to the serous envelope and has grown into the villi of the latter, yolk-sac redu
Elementary text-book of zoology (1884) Elementary text-book of zoology elementarytextbo0201clau Year: 1884 DEYEUH'.MEXT. 295 a M 079.—Diagramatic figures illustrating the formation of the fatal membranes 01 a Mammal (;ifter Kolliker). a, Ovum with first rudiments of embryo; b, Ovum wirh yolk-sac developing amnion ; c, Ovum with amniou closing and developing allautois; <l, Ovum with villous serous envelope, embryo with mouth and anus ; r, Ovum in which the vascular layer of the allantois is applied to the serous envelope and has grown into the villi of the latter, yolk-sac reduced, the amniotic cavity is increasing; D, Zoiia radiatii; D', Villi of zoua ; Sh, subzonal membrane (serous envelope) ; &, Villi of sub- zonal membrane; Ch, Chorion (vascular layer of Allantois) ; C/iz, Choriouic villi (con- sisting of choriou and subzonal membrane); Am, Amnion; Ah, Amniotic cavity; E, Embryo ; A, Embryonic thickening of the external layer ; 31, of the middle layer; J, of the inner layer; Dx, cavity of the embryonic (blastodermic) vesicle, later of the yolk- sac (umbilical vesicle); Dh, Intestinal cavity ; Dff, Umbilical stalk : Al, Alia.
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