Your heart pumps approximately 2,000 gallons (7,571 liters) of blood each day through its chambers. Of course, people cannot hold that much liquid in our bodies, so the heart just keeps circulating blood, over and over.
Besides pumping that much blood, the heart also beats about 100,000 times each day to supply every cell with oxygenated blood. No matter how many tissues and organs the heart supplies with oxygen-rich blood, it looks out for No. 1 first, making sure it gets the blood it needs.