The protective environment inside the mother's uterus is called the ______, and nutrients and waste materials are exchanged between the mother and embryo via the ______.
A)amniotic sac; placenta
B)placenta; amniotic sac
C)placenta; neural tube
D)umbilical cord; placenta
E)amniotic sac; neural tube

Question

Quizplus · Accepted Answer

The protective environment is the amniotic sac, and the exchange of nutrients and waste between mother and embryo occurs through the placenta.

The Protective Environment Inside the Mother's Uterus Is Called the ______