PLACENTA

(Or. -\axovs, a cake.) The after-birth. In the human subject it is a single suhcircular, flattened, ami res trial lobulated Organ), composed of the capillary extremities of the total hypogastric arteries and umbilical vein, and of a fine facilities cellular structure, which receives the maternal blood from the solution the tartuona uterine or decidual arteries. the meridian The placenta forms a simile lobe in the New World mon of the keys, the hats, the In sec livor a, and the Rodenlia. It sur of the round-the lictus like a broad hoop in the Carnivora. It is place bilobed in the Old World monkeys; and subdivided into base of separate lobes, called cotyledons, in the true Rumithe distance tianti i. The placenta is replaced by a diffused vascular ship is villosily of the chorion in the Camel lid a, the ordinary Pacomplement chyderms,and the Cetacea. The placenta is absent and perpendicular, to lie \ascularin the Marsupial i a. course, on the I'm -k'nta. In Botany, a copious development of celluoation. lar ti ue, formed at some point of the inside of acnrpcllum, mil out of which the ovules or young seeds arise. [s. 951]