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 . ; the mucous membrane and capillary bloodvessels of thechorion (e, a, k, of Fig. 77) and the amnion (/ of Fig. 77). There isevery reason to believe, that the maternal and fcetal membraneswhen in contact, as in pregnancy, not only act as osmotic media,but also as secreting media. G-oodsir attributed a secreting powerto the membranes and cells covering the extre
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 . ; the mucous membrane and capillary bloodvessels of thechorion (e, a, k, of Fig. 77) and the amnion (/ of Fig. 77). There isevery reason to believe, that the maternal and fcetal membraneswhen in contact, as in pregnancy, not only act as osmotic media,but also as secreting media. G-oodsir attributed a secreting powerto the membranes and cells covering the extremities of the placentalvilli. These, according to him, consist of an external membraneand nucleated cells, and an internal membrane and nucleated these a space occurs, which he regards as the cavity of asecreting follicle (Figs. 61 and 62, cl). The external membranecorresponds to the mucous lining of the uterus, which, I believe, itreally is ; the internal membrane to the outer surface of the , as explained, I regard as the mucous lining of the chorion. The chorion and mucous surface of the uterus are, as a rule,highly vascular. I have succeeded in minutely injecting the Q 11G DR J. BELL PETTIGREW ON THE. arteries and veins of the chorion and amnion of the mare;l andinjections of the membranes of the ox, sheep, and other domesticanimals, are to be found in nearly all our The mucousmembranes of the uterus and chorion, with their cells and blood-vessels, may with great propriety be compared to secreting struc-tures composed of a basement membrane, nucleated cells, andcapillaries (Fig. 67); and it appears to me that they only requireto be brought together to enclose a space to enable them to assumethe secreting function. The desired space is obtained immediately the ovum comes incontact with the mucous lining of the uterus. At first the uterinemucous membrane and utricular glands are more especially en-gaged in secreting; the product passing by
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectblo, booksubjectblood
