The Chorionic Villi Eventually Form the Placenta,a Disc-Shaped Structure That

Multiple Choice

The chorionic villi eventually form the placenta,a disc-shaped structure that ____.

A) releases sex hormones at appropriate times throughout pregnancy
B) initiates uterine contractions
C) binds to the zygote to accelerate organ development
D) nourishes the embryo throughout pregnancy
E) prevents infection by blocking the passage of microorganisms through the cervix during pregnancy