Which of the following is an advantage of the bird and mammalian circulatory system?
A)It is closed.
B)It is fully divided into two circuits.
C)There is no mixing of oxygen-poor and oxygenated blood.
D)Blood is directly pumped out to body capillaries after oxygenation in the lungs.
E)All of these are an advantage.

Question

Quizplus · Accepted Answer

The advantage of the bird and mammalian circulatory system is that it is fully closed, fully divided into two circuits, and there is no mixing of oxygen-poor and oxygenated blood. Additionally, after oxygenation in the lungs, the blood is directly pumped out to body capillaries. Therefore, all of these are an advantage.

Which of the Following Is an Advantage of the Bird