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

Question

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

Accepted Answer

The placenta is responsible for providing nutrients and oxygen to the developing embryo and fetus, as well as removing waste products. It also produces hormones to maintain the pregnancy, but not exclusively sex hormones. The placenta does not initiate uterine contractions, bind to the zygote, or prevent infection by blocking the passage of microorganisms through the cervix.