The placenta develops from
A) fetal membranes only.
B) maternal tissue only.
C) both fetal and maternal tissue.
D) separate polar bodies that develop just the placental tissues.
E) from the yolk sac.

Question

Quizplus · Accepted Answer

The placenta is a complex organ formed by both fetal and maternal tissues. The outer layer of the placenta is formed by the trophoblasts, which are derived from the fetal tissue. The inner layer of the placenta, which contains the fetal blood vessels, is made up of maternal tissue. Therefore, both fetal and maternal tissues contribute to the formation of the placenta.

The Placenta Develops from