As compared to the circulatory system of most fishes,the circulatory system of adult amphibians has the advantage of
A) a four-chambered heart.
B) heart metamorphosis.
C) a partial separation between breathing-organ and systemic circulation.
D) a pocket of the gut that serves as an air bladder.
E) a separation between oxygenated and deoxygenated blood.

Question

Quizplus · Accepted Answer

The circulatory system of adult amphibians has the advantage of having a partial separation between breathing-organ and systemic circulation. This allows for more efficient oxygenation of the blood as oxygenated blood from the lungs is immediately directed to the body tissues, while deoxygenated blood from the body tissues is directed back to the lungs for re-oxygenation. This is different from most fishes, which have a single circulatory system that pumps oxygenated and deoxygenated blood together.

As Compared to the Circulatory System of Most Fishes,the Circulatory