<span>Pulmonary vein
Pulmonary circulation is the movement of blood starting from the heart, where deoxygenated, or carbon dioxide-filled, blood leaves from the right ventricle and through the pulmonary valve, then into the left and right pulmonary arteries and arrives at the lungs. During the process of respiration, the carbon dioxide is released and oxygen is added to the blood. </span>
<span> a characteristic of acids is that they react with metals to release hydrogen gas.</span>
I believe it is B i took this test last year.
Answer:
B. Oxygen molecules recombine to allow cells to get larger
