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Chorionic Villi
Chorionic Villus; Placental Villus; Villi, Chorionic; Villi, Placental; Villus, Chorionic; Villus, Placental
The threadlike, vascular projections of the chorion. Chorionic villi may be free or embedded within the DECIDUA forming the site for exchange of substances between fetal and maternal blood (PLACENTA).