Chorionic vessels

Chorionic vessels
Vasculature of the placenta, with a chorionic artery labeled in .

Chorionic (plate) vessels are blood vessels, including both arteries and veins, that carry blood through the chorion in the feto-placental circulation.

Chorionic arteries branch off the umbilical artery, and supply the capillaries of the chorionic villi. Increased vasocontractility of chorionic arteries may contribute to preeclampsia.[1]


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  • Chorionic villi — Diagram of a transverse section, showing the mode of formation of the amnion in the chick. The amniotic folds have nearly united in the middle line. Ectoderm, blue; mesoderm, red; entoderm and notochord, black. (Vill …   Wikipedia

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  • Placental cotyledon — Structure of the placenta, with a placental cotyledon marked in rectangle. Gray s subject #12 63 …   Wikipedia

  • hemoendothelial — he·mo·en·do·the·li·al or chiefly Brit hae·mo·en·do·the·li·al .en də thē lē əl adj of a placenta having the fetal villi reduced to bare capillary loops that are bathed in maternal blood <higher rodents are hemoendothelial> * * *… …   Medical dictionary

  • hemoendothelial placenta — a placenta in which maternal blood comes in contact with the endothelium of chorionic vessels; this does not occur in humans …   Medical dictionary

  • chorion — chorionic, chorial, adj. /kawr ee on , kohr /, n. 1. Embryol. the outermost of the extraembryonic membranes of land vertebrates, contributing to the formation of the placenta in the placental mammals. 2. Zool. the membrane around the eggs of… …   Universalium

  • pregnancy — /preg neuhn see/, n., pl. pregnancies. the state, condition, or quality of being pregnant. [1520 30; PREGN(ANT) + ANCY] * * * Process of human gestation that takes place in the female s body as a fetus develops, from fertilization to birth (see… …   Universalium

  • endocrine system, human — ▪ anatomy Introduction  group of ductless glands (gland) that regulate body processes by secreting chemical substances called hormones (hormone). Hormones act on nearby tissues or are carried in the bloodstream to act on specific target organs… …   Universalium

  • human embryology — ▪ biology Introduction       the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth.       The human body, like that of most animals, develops from a single cell produced by the union of… …   Universalium

  • Placenta — A temporary organ joining the mother and fetus, the placenta transfers oxygen and nutrients from the mother to the fetus, and permits the release of carbon dioxide and waste products from the fetus. It is roughly disk shaped, and at full term… …   Medical dictionary

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