Which of the following blood vessels carries oxygenated blood into the heart?

The blood vessel that carries oxygenated blood into the heart is the pulmonary vein. The pulmonary vein is responsible for transporting blood that has picked up oxygen in the lungs and returning it to the left atrium of the heart. The left atrium then pumps the oxygen-rich blood into the left ventricle, which contracts and sends the blood out to the body through the aorta. The other blood vessels listed in the options either carry deoxygenated blood (such as the pulmonary artery) or return blood to the heart that has already been circulated through the body (such as the anterior and posterior vena cava).