Placenta and Umbilical Cord
August 17, 2011
The foetal blood in the chorionic villi is separated from the maternal blood, in the intervillous spaces, by the Placental Barrier which is composed of :1. Endothelium of the foetal blood vessels, 2. The villous stroma, 3. The cytotrophoblast, and 4. The syncytiotrophoblast.