The __________ completely encloses the embryo and provides it with a stable environment.
A) yolk sac
B) amnion
C) chorion
D) chorionic villus
E) allantois

Question

Quizplus · Accepted Answer

The amnion is a membrane that forms a fluid-filled sac that completely encloses the developing embryo or fetus, providing it with a stable and protected environment. The yolk sac produces blood cells and germ cells, but does not enclose the embryo. The chorion and chorionic villi are involved in the formation of the placenta, but do not completely enclose the embryo. The allantois is involved in the formation of the umbilical cord and the urinary bladder, but also does not completely enclose the embryo.

The __________ Completely Encloses the Embryo and Provides It with a Stable