Oxygenated blood from the lungs enters the heart through the

The pulmonary veins bring oxygen-rich blood from the lungs into the left atrium, which passes it to the left ventricle and then to the body through the aorta. The right atrium receives deoxygenated blood from the body through the vena cavae. The pulmonary artery, not a vein, carries deoxygenated blood to the lungs, which is an exception to remember.