The fetal layer of the placenta on the other hand is called the chorion, which is a tissue that has fingerlike projections called chorionic villi which contain tiny fetal arterioles and venules.

胎盘的“胎儿”称为绒毛膜；是有绒毛膜绒毛手指状突起的组织，富含微小的胎儿动脉和静脉。