Which structure is responsible for nourishing the fetus?

Correct option is D

Ans (d)
Sol. The structure primarily responsible for nourishing the fetus during the early stages of pregnancy is the yolk sac. It provides nutrients and oxygen to the developing embryo until the placenta takes over this function.
Here's a brief explanation of the other options:
· Decidua: This is the endometrial lining of the uterus that thickens during pregnancy to support the developing embryo.
· Amniotic fluid: This fluid surrounds the fetus, protecting it from physical trauma and maintaining a stable temperature.
· Corpus luteum: This is a temporary endocrine structure that produces progesterone and estrogen to support early pregnancy.
Therefore, the correct answer is (d) Yolk sac.