What are the differences between the aorta and the pulmonary vein?

The aorta and the pulmonary vein are both major blood vessels in the circulatory system, but they serve different functions. The aorta is the largest artery, carrying oxygen-rich blood from the left ventricle of the heart to the rest of the body. In contrast, the pulmonary vein transports oxygenated blood from the lungs to the left atrium of the heart. Additionally, the aorta is part of the systemic circulation, while the pulmonary vein is part of the pulmonary circulation.