Question

Function of allantois is

• A. Respiration
• B. Excretion
• C. Nutrition and excretion
• D. Protection from shock

Answer 1

Answer: (C)

Nutrition and excretion

The function of allantois in human embryology is not specific. It is present in a reduced form. Though in other vertebrates like reptiles and aves allantois act as an extracellular kidney by storing nitrogenous wastes, thus the function is excretory in nature. In other vertebrates, the placenta is formed from chorion and allantois which forms the chorioallantoic placenta.

So, the correct answer is 'Nutrition and excretion'.