A textbook of obstetrics . Fig. 95.—Syncytial cancer (Gottschalk). Localized tumors in the placenta are rare. Leopold in morethan 7000 specimens found such a tumor only Fig. 96.—Metastasis of syncytial cancer in liver, showing cells from Langhans layerand true syncytial cells. 1 V. Mars, Monatschr. f. Geburtsh. u. Gyn., Bd. iv, H. 3, p. 229. 32 PREGNANCY. THE UMBILICAL CORD. The early development of the umbilical cord, or the formationof the allantois, has been studied upon the lower animals, as inall the human embryos observed the connection between theembryo and the chorion was alrea
A textbook of obstetrics . Fig. 95.—Syncytial cancer (Gottschalk). Localized tumors in the placenta are rare. Leopold in morethan 7000 specimens found such a tumor only Fig. 96.—Metastasis of syncytial cancer in liver, showing cells from Langhans layerand true syncytial cells. 1 V. Mars, Monatschr. f. Geburtsh. u. Gyn., Bd. iv, H. 3, p. 229. 32 PREGNANCY. THE UMBILICAL CORD. The early development of the umbilical cord, or the formationof the allantois, has been studied upon the lower animals, as inall the human embryos observed the connection between theembryo and the chorion was already established. Indeed, accord-ing to His, the human embryo is from the first in connection withthe periphery of the ovum. Very early, therefore, in embryonallife there may be observed a sac-like projection from the posteriorend of the intestinal tract, which, at first solid, but later contain-ing a canal, grows outward and backward, owing to the presenceof the large umbilical vesicle anteriorly, until it comes in contactwith the periphery of the ovum. Within this sausage-shaped x
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectobstetrics, bookyear1
