Human physiology (Volume 2) . Uterine Surface of the Foetal Surface of the Placenta. 452 EMBRYOLOGY. janus, believing it to be produced at a later period than the deciduavera, gives it the name of membrana decidua (SeeFig. 236, page 413 of this volume.) Breschet,again, maintains thattwo lamina? — decidua vera and decidua reflexa — are found in-tervening between the uterus and placental whilst Velpeau main-tains that the true decidua never exists there! The foetal or umbilical surface is smooth, polished, covered bythe chorion and amnion, and exhibits the distribution of t
Human physiology (Volume 2) . Uterine Surface of the Foetal Surface of the Placenta. 452 EMBRYOLOGY. janus, believing it to be produced at a later period than the deciduavera, gives it the name of membrana decidua (SeeFig. 236, page 413 of this volume.) Breschet,again, maintains thattwo lamina? — decidua vera and decidua reflexa — are found in-tervening between the uterus and placental whilst Velpeau main-tains that the true decidua never exists there! The foetal or umbilical surface is smooth, polished, covered bythe chorion and amnion, and exhibits the distribution of the um-bilical vessels, and the mode in which the cord is attached to theorgan. The following are the anatomical constituents of the placenta,as usually described by anatomists. First. Bloodvessels, fromtwo sources, the mother and the fetus. The former proceed fromthe uterus, and consist of arteries and veins, of small size but con-siderable number. The vessels, which proceed from the foetus,are those that constitute the umbilical cord ;—viz. the umb
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectphysiology, bookyear1
