Villus (anatomy)

Villi ( Villi ), are projections or mostly unbranched protuberances of the organ tissue in thread, conical or finger shape, z. B. Villi and the chorionic villi of the placenta . These serve to enlarge the surface of the organ and represent metabolic barriers (e.g. in the placenta between mother and child).

The term villi is used in gynecology and obstetrics to refer to the chorionic villi. They are part of the fetal supply system in the womb.