villous chorion

villous chorion

the part of the chorion where the villi persist and form the fetal part of the placenta.

vil·lous chor·i·on

(vil'ŭs kōr'ē-on)
That part of the chorion where the chorionic villi have persisted to form the fetal part of the placenta.
Synonym(s): bushy chorion, chorion frondosum.
References in periodicals archive ?
The basal layer of the endometrium and the villous chorion adjacent to the endometrium form the functional placenta that is responsible for feto - maternal nutrient and waste substance exchange.