The _______ is an important structure for waste storage in birds and some mammals,but not in humans.
A) umbilical cord
B) yolk sac
C) placenta
D) allantois
E) amnion

Question

Quizplus · Accepted Answer

The allantois is an important structure for waste storage in birds and some mammals, such as cows and sheep. In these animals, the allantois collects nitrogenous waste products from the developing embryo and stores them until they can be safely eliminated. However, in humans, the allantois is not as prominent and does not serve this same function.

The _______ Is an Important Structure for Waste Storage in Birds