This will become the primary structure for exchange of material between the mother and the fetus.
A)Chorionic villi of the placenta
B)Amnion
C)Amnionic fluid
D)Embryonic disc
E)Endoderm

Question

Quizplus · Accepted Answer

The chorionic villi of the placenta are finger-like projections that emerge from the chorion, the outermost membrane surrounding the developing embryo. These villi contain both fetal and maternal blood vessels, and their exchange of nutrients and gases allows for the supply of oxygen and nutrients from the mother to the developing embryo, as well as the removal of carbon dioxide and waste products from the developing embryo.

This Will Become the Primary Structure for Exchange of Material