What structure allows for the exchange of oxygen and carbon dioxide between mother and fetus?
A) chorionic villi
B) umbilical cord
C) placenta
D) chorion
E) amnion

Question

Quizplus · Accepted Answer

The chorionic villi are surrounded by maternal blood, yet maternal and fetal blood never mix because exchange always takes place across the walls of the villi. Carbon dioxide and other wastes move from the fetal side to the maternal side of the placenta, and nutrients and oxygen move from the maternal side to the fetal side.

What Structure Allows for the Exchange of Oxygen and Carbon