The pulmonary artery and its branches deliver blood rich in carbon dioxide (and lacking in oxygen) to the capillaries that surround the air sacs. The circulation of the blood through the lungs. The veins that return the oxygenated blood from the lungs to the left atrium of the heart.
Answer:
age
Explanation:
the answer to this question is age
Answer is C- The social life is as important as the athletic aspect in most masters.