. The physiology of reproduction. Reproduction. 448 THE PHYSIOLOGY OF REPRODUCTION first most marked in the lips and sides of the groove, and small superficial haemorrhages occur, which detach the epithehum at places. The tissue fluids also exude, and, along with the blood and desquamated epithehum, form a coagulum around the' ovum. Part of it shuts off the entrance of the furrow from the uterine cavity. The epithehum of the crypt, after a preUminary prohfera- tion such as Robinson describes in the mouse and rat, degenerates. Sp. Fig. 111.—The allantoidean diplo-trophoblast of Erinaceus
. The physiology of reproduction. Reproduction. 448 THE PHYSIOLOGY OF REPRODUCTION first most marked in the lips and sides of the groove, and small superficial haemorrhages occur, which detach the epithehum at places. The tissue fluids also exude, and, along with the blood and desquamated epithehum, form a coagulum around the' ovum. Part of it shuts off the entrance of the furrow from the uterine cavity. The epithehum of the crypt, after a preUminary prohfera- tion such as Robinson describes in the mouse and rat, degenerates. Sp. Fig. 111.—The allantoidean diplo-trophoblast of Erinaceus. (From Hubreoht's "The Placentation of Erinaceus europceus," Quar. Jour. Micr. Scl, vol. xxx., 1889.) , trophospongia; Tr., trophoblast; , layer of fusiform cells; Sp., spaces in trophoblast; , thin layer of somatic mesoblast. entirely, part being stripped off by extravasated blood and part yielding to the of the foetal ectoderm. Its remnants and the other constituents of the coagulum probably furnish pabulum for the ovum. The development of the de- cidua proceeds rapidly, and the swollen hps of the groove fuse together to complete the implantation cavity. The trophoblast is now in contact with decidual tissue, of which the innermost zone consists of a stratified layer of fusiform cells, best marked in the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marshall, F. H. A. (Francis Hugh Adam), 1878-1949; Cramer, William, 1878-1945; Lochhead, James. London, New York, Longmans, Green
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreproduction, bookyea
