Question

What is the contribution of the allantois to embryonic development?

Options

• It contributes to umbilical structures and vessels

• It forms the amnion and amniotic fluid

• It forms the outer protective layer of the embryo

• It develops into the nervous system

Answer 1

The allantois is an extra-embryonic membrane that contributes to the development of umbilical structures and blood vessels. These allantoic vessels form the umbilical arteries and vein, which are essential for maternal-fetal circulation and nutrient/waste exchange through the developing placenta.