Most Current Study (test not taken)
The heart is a dual pump, circulating blood through two separate closed systems. Oxygen-carrying blood leaves the left ventricle through the aorta. It circulates through the body and returns, deoxygenated, to the right auricle (atrium) via the superior (upper) and inferior (lower) vena cava. The right ventricle pumps this blood through the pulmonary artery to the lungs, where it exchanges carbon dioxide for oxygen. Oxygenated blood then returns to the left auricle (atrium) of the heart, ready for arterial circulation, through the pulmonary veins.