Placental barrier(胎盘屏障) the structure between fetal and maternal blood --components 1)Endothelium /basement membrane of chorion capillary 2) CT in the core of the villus 3)trophoblast epithelium /basement membrane 10 weeks Term cytotrophoblast capillaries syncytiotrophoblastPlacental Barrier（胎盘屏障） --the structure between fetal and maternal blood --components: 1)Endothelium /basement membrane of chorion capillary 2) CT in the core of the villus 3) trophoblast epithelium /basement membrane