Placenta(胎盘)- Overview e Functions as Lungs Gi tract, Liver, Kidneys, Endocrine Placenta proper. Chorion frondosum(丛密绒毛膜)+ Decidua basalis( 底蜕膜) Maternal blood in intervillous space Spiral arteries Decidua basalis Amnion Uterine cavity Smooth chorion Mucous plug Decidua parietalisPlacenta（胎盘） - Overview • Functions as: – Lungs, GI tract, Liver, Kidneys, Endocrine • Placenta proper: Chorion frondosum（丛密绒毛膜）+ Decidua basalis（ 底蜕膜）