The structure which helps in the nutrition of the Embryo is A)Yolk sac B)Amniotic membrane C)Crypts D)Placenta
Option A) 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 established
