. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. REPRODUCTION. 81 is now very small; the decidua reflexa becomes almost non- vascular, and fuses finally -witli tlie decidua vera and the cho- rion, which except at one part has ceased-to be villous and vas- cular ; so that becoming thinner and thinner with the advance of pregnancy, the single membrane, arising practically from. Flo. 89.—Haman embiyo, twelve weeks old, with its coverings; natural size. The navel-cord passes from the navel to the placenta. 5, amni
. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative. REPRODUCTION. 81 is now very small; the decidua reflexa becomes almost non- vascular, and fuses finally -witli tlie decidua vera and the cho- rion, which except at one part has ceased-to be villous and vas- cular ; so that becoming thinner and thinner with the advance of pregnancy, the single membrane, arising practically from. Flo. 89.—Haman embiyo, twelve weeks old, with its coverings; natural size. The navel-cord passes from the navel to the placenta. 5, amnion; c, chorion; d^ pla- centa; d', remains of tufts on the smooth chorion; /, de(&d'ua r^exa (inner); g, decidua vera (outer). (Haeckel after Bernhard Schultze.) this fusion of several, is of a low type of structure, the result of gradual degeneration, as the rdle they once played was taken up by the other parts. But of paramount importance is the formation of the pla- centa. The chorion ceases to be vascular except at the spot at which the villi not only remain, but become more vascular and branch into arborescent forms of considerable complexity. It is discoidal in form, made up of a foetal part just described and a maternal part, the decidua serotina, the two becoming blended. 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 Mills, Wesley, 1847-1915. New York, Appleton
Size: 1448px × 1725px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormillswes, bookcentury1800, bookdecade1890, bookyear1890
