A manual of practical obstetrics . 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. Human foetus five weeks old. (From His ) X 5. The Placenta.—The placenta at full term is a soft, spongymass, irregularly saucer-shaped, seven or eight inches indiameter, th
A manual of practical obstetrics . 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. Human foetus five weeks old. (From His ) X 5. The Placenta.—The placenta at full term is a soft, spongymass, irregularly saucer-shaped, seven or eight inches indiameter, three-quarters of an inch thick near the centre, andfrom one-eighth to one-fourth of an inch at the edge ; averageweight, twenty ounces. It varies much in all these particulars. It begins to be formed about the end of the second monthof gestation, and attains its essential characteristics in a fewweeks more. The exact mode of its development, its minute structure, andthe precise relation of its bloodvessels with those of the foetalvessels in the chorial villi, are matters regarding which therestill remains great uncertainty. It may be sufficient for prac-tical purposes to understand the following leading matters offact about which there is no doubt, viz.: 1. The chorial villi,with their loops of bloodvessels, penetrate, like the roots of atree, the thick decidua serotina. 2. The decidua serotina isalso penetrated fr
Size: 1459px × 1712px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisherphila, bookyear1895
