Which structure is part of the placenta and completely surrounds the embryo?
A) chorion
B) amnion
C) yolk sac
D) allantois

Question

Quizplus · Accepted Answer

The chorion is a structure that develops from the outermost layer of cells of the embryo and becomes part of the placenta. It completely surrounds the embryo and helps to provide oxygen and nutrients to the developing fetus while removing waste products. The amnion is a membrane that surrounds the embryo and is filled with amniotic fluid, but it does not form part of the placenta. The yolk sac and allantois are also embryonic structures that are involved in nutrient transfer, but they do not completely surround the embryo like the chorion.

Which Structure Is Part of the Placenta and Completely Surrounds