The physiology of the circulation in plants : in the lower animals, and in man : being a course of lectures delivered at surgeons' hall to the president, fellows, etc of the Royal college of surgeons of Edinburgh, in the summer of 1872 . Fig. 61.—The extremity of a placental villus (human), a, The external membrane of thevillus, the lining membrane of the vascular system of the mother, b, The external cells ofthe villus, cells of the central portion of the placental decidua. c, c, Germinal centres of theexternal cells, d, The space between the maternal and fetal portions of the villus, e, Thei
The physiology of the circulation in plants : in the lower animals, and in man : being a course of lectures delivered at surgeons' hall to the president, fellows, etc of the Royal college of surgeons of Edinburgh, in the summer of 1872 . Fig. 61.—The extremity of a placental villus (human), a, The external membrane of thevillus, the lining membrane of the vascular system of the mother, b, The external cells ofthe villus, cells of the central portion of the placental decidua. c, c, Germinal centres of theexternal cells, d, The space between the maternal and fetal portions of the villus, e, Theinternal membrane of the villus, the external membrane of the chorion. /, The internalcells of the chorion, g, The loop of umbilical vessels.— Goodsir, 1845. Fig. 62.—This drawing illustrates the same structure as Fig. 61, and has been introducedto show the large space {d) which occasionally intervenes between the internal membrane andthe external cells. It would appear that into this space the matter separated from thematernal blood by the external cells of the villus is cast, before being absorbed through theinternal membrane by the internal cells. This space, therefore, is the cavity of a secretingfollicle, the external c
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectblo, booksubjectblood
