This blood is received through the pulmonary vein . There are 2 pulmonary veins. One flows from the right lung and one flows from the left lung. Ventricles are the lower chambers. They receive blood from the atria and push it outward through arteries.
Arteries send blood away from the heart.
The right ventricle pushes unoxygenated blood to the lungs through the pulmonary artery . There are 2 pulmonary arteries. One flows to the right lung and one flows to the left lung. The left ventricle pushes oxygenated blood into the body through the aorta . These are comprised of endocardial membranes.