Which artery is responsible for carrying low oxygen blood?

The pulmonary arteries are responsible for carrying low oxygen blood from the heart to the lungs. After the blood has circulated throughout the body and delivered oxygen to the tissues, it returns to the heart deoxygenated. The right ventricle of the heart pumps this low oxygen blood into the pulmonary arteries. These arteries then transport the blood to the lungs, where it releases carbon dioxide and absorbs oxygen during the process of respiration.

In contrast, the coronary arteries supply the heart muscle itself with nutrient-rich, oxygenated blood, while the aorta carries oxygenated blood from the heart to the rest of the body. The femoral arteries, like the aorta, deliver oxygenated blood to the lower limbs. Therefore, the unique function of the pulmonary arteries in transporting deoxygenated blood distinguishes them as the correct choice for this question.