D002824Level 6

Chorionic Villi

**Definition:** 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).

**Tree numbers:** - A10.615.284.473.200 - A16.254.750.473.200 - A16.710.189

**Synonyms:** - Placental Villi

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