Q. Which of the following embryonic-membrane structure is excretory in function?
A) Amnion
B) Allantois
C) Yolk sac
D) Vitelline chorion
Explanation
Allantois si the extraembryonic membrane that develops in embryon of reptiles, birds and mammals as a growth from the hindgut. It acts as a urinary bladder for the storage of waste products and as means of providing the embryo with oxygen and food.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.