A manual of practical obstetrics . Human ovum during third week. A. Amnion. A. s. Allantoic Heart. V. Bloodvessels of Y. s., the yolk sac, or umbilical vesicle.(From His, after Coste.) At the end of the third week the whole ovum is coveredwith chorial villi, and on cutting it open the embryo may beseen as represented, of natural size, in Fig. 33. Fig. Human ovum, with contained embryo, about the end of third week.(From Kolliker, after Allen Thompson.) The next, Fig. 34, page 86, represents a foetus near the endof the fifth week, magnified five diameters. 86 FECUNDATION AND NUTRIT
A manual of practical obstetrics . Human ovum during third week. A. Amnion. A. s. Allantoic Heart. V. Bloodvessels of Y. s., the yolk sac, or umbilical vesicle.(From His, after Coste.) At the end of the third week the whole ovum is coveredwith chorial villi, and on cutting it open the embryo may beseen as represented, of natural size, in Fig. 33. Fig. Human ovum, with contained embryo, about the end of third week.(From Kolliker, after Allen Thompson.) The next, Fig. 34, page 86, represents a foetus near the endof the fifth week, magnified five diameters. 86 FECUNDATION AND NUTRITION OF OVUM. The more exact appearances of the foetus at different periodsof gestation are given in Chapter XXXIX., on the Jurisprudence of Midwifery. Fig. 34.
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