A system of obstetrics . the true amnion turns back, extends into the primitiveamniotic cavity, , to form, in mammals, the foetal portion of theplacenta. The ^[c are depicted embryonicrabbits at this stage of development: the embryos were taken from theuterus seven days after coition. Fig. 44 is a view of the developing Fig. 14. Fig. 4-->.. Fm. 14.—Rabbits Embryo, taken from the uterus seven days nfter fertilization, Been from above(the blastodermic vesicle was mm. in length) : mo, remnanl of zona pellncida; ge, limitof extension of hypoblast beneath blastodermic vesicle; ag, embry
A system of obstetrics . the true amnion turns back, extends into the primitiveamniotic cavity, , to form, in mammals, the foetal portion of theplacenta. The ^[c are depicted embryonicrabbits at this stage of development: the embryos were taken from theuterus seven days after coition. Fig. 44 is a view of the developing Fig. 14. Fig. 4-->.. Fm. 14.—Rabbits Embryo, taken from the uterus seven days nfter fertilization, Been from above(the blastodermic vesicle was mm. in length) : mo, remnanl of zona pellncida; ge, limitof extension of hypoblast beneath blastodermic vesicle; ag, embryonic area or germinal area. Fig. 45.—The Same Embryo as in Fig. 14, viewed from one side (the zona pellncida lias beenremoved): ag, embryonic area; ge, peripheral limit of hypoblast from KSlliker). Bothfigures magnified about ten diameters. oospesm from above; it shows the germinal area, cuj (=area pellucidaof chick), and the limit to which the hypoblast, gey has spread beneaththe blastodermic vesicle; also the zona pellucida, mo. Fig. 45 is aside view of the same embryo, the zona pellucida being omitted ; ag isagain the germinal area, and ge points to the limit of the extension ofthe hypoblast beneath the non-embryonic epiblast at this epoch. In the embryonic <t germinal area a primitive streak and groovenext make their appearance,
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
