Which of the following embryonic-membrane structure is excretory in function? |
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a) |
Amnion |
b) |
Allantois |
c) |
Yolk sac |
d) |
Vitelline chorion |
Which of the following embryonic-membrane structure is excretory in function? |
|||||||
a) |
Amnion |
b) |
Allantois |
c) |
Yolk sac |
d) |
Vitelline chorion |
(b)
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.