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chorionic
cho·ri·on C0327400 (kôr′ē-ŏn′)n. The outer membrane enclosing the embryo in reptiles, birds, and mammals. In placental mammals it contributes to the development of the placenta.
[Greek khorion; see gherə- in Indo-European roots.]
cho′ri·on′ic (-ŏn′ĭk) adj.Thesaurus| Adj. | 1. | chorionic - of or relating to a chorion; "a chorionic villus is a minute vascular projection on the fetal chorion" |
EncyclopediaSeeChorionchorionic
chorionic [kor″e-on´ik] pertaining to the chorion.chorionic villi 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 the fetal capillaries through the walls of the villi into the maternal blood. See also sampling" >chorionic villus sampling.cho·ri·on·ic (kō'rē-on'ik), Relating to the chorion.cho·ri·on·ic (kōr'ē-on'ik) Relating to the chorion. chorionic Related to chorionic: chorionic gonadotropin, chorionic plate, chorionic sac, Chorionic cavity, Chorionic Villi Sampling
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