The extraembryonic membrane that forms part of the placenta is the ____.
A)amnion
B)allantois
C)chorion
D)yolk sac
E)umbilical cord

Question

Quizplus · Accepted Answer

The chorion is the extraembryonic membrane that forms part of the placenta. The amnion is the membrane that surrounds and protects the embryo and forms the amniotic sac. The allantois is involved in waste elimination and contributes to the umbilical cord. The yolk sac produces blood cells and germ cells, but doesn't form part of the placenta. The umbilical cord connects the embryo/fetus to the placenta, but isn't a membrane.

The Extraembryonic Membrane That Forms Part of the Placenta Is