In vertebrates with a double-loop circulation as illustrated in Figure 27–4, the loop that passes through the lungs is responsible for:
Aexchanging carbon dioxide for oxygen from the air.
Bexchanging oxygen for carbon dioxide from the air.
Cdelivering oxygen-rich blood to the body.
Ddelivering oxygen-poor blood to the heart.
Aexchanging carbon dioxide for oxygen from the air.
Bexchanging oxygen for carbon dioxide from the air.
Cdelivering oxygen-rich blood to the body.
Ddelivering oxygen-poor blood to the heart.