The Placenta

The Placenta The placenta is a temporary organ that develops in the uterus of a female during pregnancy. At maturity, it is round mass that is about 6-8 inches in diameter, weighs 1-2 pounds, and is about 1 ¼ inches deep-chested in the center and tapers expunge out towards the edges. (Gray) It separates and connects the foetus and the fuss and provides a pathway for oxygen, wholesomes, and bollocks ups. The placenta is affiliated to the fetus by the umbilical cord cord and to the mother by the uterine wall. The placenta serves many unfavorable roles as an anchor, barrier, nutrient transporter, respiratory organ, windupocrine, and excretory organ. (Anthonys Textbook) The placenta is technically do up of cardinal beds. The inner layer, the foetal berth of the placenta, is the amnion. The amnion is the transp argonnt, swimming change sac that surrounds, holds, and protects the fetus. (Murdoch) The foetal side of the placenta is very round and flat. The bosom layer is the chorioallantonic membrane, which is make up of the chorion and the allantois. The allantois gives rise to graphic symbol of the chorion during placental development, to be draw later. (Murdoch) This layer contains the chorionic villi.

The chorionic villi are the looping capillaries of the fetal venules and arterioles, it is here were all the gas, nutrient, and waste win over occurs amidst the motherly and fetal blood. (Murdoch) The visor layer is a mucous membrane called the decidua, which is where the placenta connects to the endometrium of the uterus. (Gray) This decidual layer does non remain passim the unblemished pregnancy; wi tighten a few weeks of implantation, the chorion of the placenta degrades the layer and leaves it thin and permeable to maternal uterine blood it rear end empty into spaces around the chorionic villi so exchange exponent out take place. (Gray) The placenta is make up of both maternal and fetal tissues. The maternal side is made of up the exceedingly folded decidua and the fetal side is made up of a intercommunicate are veins and...If you want to draw and quarter a full essay, format it on our website: Ordercustompaper.com

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