A) Urinary bladder
B) Amnion
C) Allantois
D) Liver
Correct Answer: C
Solution :
Allantois is a tiny sausage shaped pouching, which arises from the gut of the embryo near the yolk sac. In human, it supplies the blood vessels to the placenta. But in reptiles, birds and egg laying animals, it helps in the exchange of oxygen and carbon dioxide. Other than allantois, there 3 extra embryonic membranes are found. These are, amnion, chorion and yolk sac.
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