上海交通大学医学院：《妇产科学》（双语） 39 Physiology of pregnancy

Structure of placenta 口 Round 口 Weight:450-650g 口 Diameter:16-20cm 口 Thickness.:1-3cm thick in center and thin in margin

Structure of placenta ❑ Round ❑ Weight:450-650g ❑ Diameter:16-20cm ❑ Thickness:1-3cm thick in center and thin in margin

Function of placenta One important function of placenta is substance exchange between maternal and fetal

Function of placenta One important function of placenta is substance exchange between maternal and fetal