Question

Inside the uterus a baby is held within two membranes - the chorion and amnion, collectively known as the __________. The membranes are rather tough and slightly elastic and their function is to provide protection around your baby and to hold the amniotic fluid your baby floats in.
A) myometrium
B) placenta
C) sac
D) villi

Answer 1

The answer is C.) Sac. More formally known as the amniotic sac. It's also sometimes called the bag of waters. 

Answer 2

Sac is the answer c hope you cool