A) Yolk sac
B) Amniotic membrane
C) Crypts
D) Placenta
Correct Answer: A
Solution :
The yolk sac is a membranous sac attached to an embryo, providing early nourishment. It functions as the developmental circulatory system of the human embryo, before internal circulation begins. It carries out transfer of nutrients in weeks 2 and 3 when the utero-placental circulation is establishedYou need to login to perform this action.
You will be redirected in
3 sec