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 . s 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 cavi
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 . s 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 cells being the secreting epithelia, and the maternal bloodvessel systemthe capillaries of supply. This maternal portion of the villus and its cavity correspond tothe glandular cotyledons of the ruminants, and the matter thrown into the cavity to themilky secretion of these organs.—Goodsir, 1845. Fig. 63.—Diagram illustrating Dr John Keids views of the human placenta, a. Curlingartery. 6, Uterine vein, c, Uterine sinus formed by expansion of artery (a) and vein (b).d, Fcetal tufts or villi, with inner coat (c) of vascular system la, I) of mother envelopingthem.—1841. Fig. 64. Fig.
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