The outermost layer of the amniotic sac is the a. amniotic fluid b. amnion c. chorion d. placenta

The amniotic sac is pair of membranes, which hold a developing embryo (and later fetus) until shortly before birth.

The outermost layer of the amniotic sac is the chorion. Correct C

The chorion contains the amnion and is part of the placenta. The amnion on the other hand is the inner layer which contains the amniotic fluid and the fetus.

they need it to survive

explanation:

the answer is : )