Question

In vertebrates with a double-loop circulation as illustrated in the picture, the loop that passes through the lungs is responsible for...

Answer 1

A. exchanging carbon dioxide for oxygen from the air.

B. exchanging oxygen for carbon dioxide from the air.

C. delivering oxygen-rich blood to the body.

D. delivering oxygen-poor blood to the heart.

Answer 2

@estudier

Answer 3

@Kryten

Answer 4

Think about what the lungs do - here's a clue - the air you breathe out contains less oxygen and more carbon dioxide than the air you breathe in. The oxygen gets used up by the body and carbon dioxide is produced by cellular respiration.

Answer 5

Right so It would be A?

Answer 6

A would be one of the correct answers.

Answer 7

I got C