. The physiology of reproduction. Reproduction. FCETAL NUTRITION: THE PLACENTA 471 origin, the mononuclear cells in Man appear to be engaged in disintegrating mucosal tissue, and producing a zone of coagula- tion necrosis, a symplasma, around the trophoblast. But they differ from similarly situated cells in lower animals, the mouse, in showing no evidence of ingestion of formed tissue- elements. .^x ⢠' 9 â¦S;;' -»*⢠^ ». â %»â ,»( Fig. 12i.âSection of a portion of the necrotic zone of the decidua, and of the layer of large cells on its inner aspect. (Bryce and Teacher.) nz., n
. The physiology of reproduction. Reproduction. FCETAL NUTRITION: THE PLACENTA 471 origin, the mononuclear cells in Man appear to be engaged in disintegrating mucosal tissue, and producing a zone of coagula- tion necrosis, a symplasma, around the trophoblast. But they differ from similarly situated cells in lower animals, the mouse, in showing no evidence of ingestion of formed tissue- elements. .^x ⢠' 9 â¦S;;' -»*⢠^ ». â %»â ,»( Fig. 12i.âSection of a portion of the necrotic zone of the decidua, and of the layer of large cells on its inner aspect. (Bryce and Teacher.) nz., necrotic zone ; mc, large cells in various stages of degeneration ; cav., blood-filled implantation cavity. In the youngest ova no space exists between the trophoblast and the wall of the implantation cavity (Fig. 125). In later specimens a space is formed, apparently by the absorption of the debris of the necrotic zone. How this excavation is brought about is uncertain. According to Peters, the trophoblast may exercise a phagocytic action. Bryce and Teacher, however, found. 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
