Chorionic villi are villi that sprout from the chorion in order to give a maximum area of contact with the maternal blood. They are the sine qua non of pregnancy, from a histomorphologic perspective, and are by definition products of conception. Embryonic blood is carried to the villi by the branches of the umbilical arteries, and after circulatin...
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http://en.wikipedia.org/wiki/Chorionic_villi
<anatomy> The vascular projections from the chorion. ... (27 Sep 1997) ...
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http://www.encyclo.co.uk/local/20973
numerous branching projections from the external surface of the chorion that provide for exchange between the maternal and fetal circulation. Oxygen and nutrients in the maternal blood diffuse through the walls of the villi and enter the blood of the embryo or fetus. Carbon dioxide and waste products diffuse from blood in...
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http://www.encyclo.co.uk/local/21001
Type: Term Definitions: 1. vascular processes of the chorion of the embryo entering into the formation of the placenta.
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http://www.medilexicon.com/medicaldictionary.php?t=98634
Slender, finger-like projections that attach the developing embryo/fetus to the wall of the uterus. Most of the placental disc is composed of chorionic villi. During chorionic villus sampling, the cells of the chorionic villi are sampled.
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http://www.pregnology.com/
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