pulmonary vein of heart

aorta aortic are arteries artery atria atrium bicuspid blood capillaries carbondioxide cava cavae chambers circulation circulatory contract deoxygenated diastole heart human left lung mitral move organ oxygenated pericardium pulmonary receive receives relaxed rich right system systole then there tricuspid two valve vein vena venae venous ventricle ventricles while