chorion laeve


chorion

 [kor´e-on] an extraembryonic fetal membrane, composed of trophoblast lined with mesoderm; it develops villi, becomes vascularized, and forms the fetal part of the placenta.chorion frondo´sum the placental part of the chorion; it is covered by villi.chorion lae´ve the nonvillous, membranous part of the chorion.

smooth cho·ri·on

the nonvillous, membranous part of the chorion where the chorionic villi have degenerated. Synonym(s): chorion laeve

chorion laeve

The smooth, nonvillous portion of the chorion. See also: chorion