How the heart pumps blood

How the heart pumps blood If you did not have a heart you would not be alive. The heart pumps blood. Did you know that in the odd days that they did not know what it was. It has four chambers. With the four chambers when you buy it in water it willmot pump. If you think of two of the changes it will pump water in it. In the old days they had never seen a heart, some they rely on anmasinds and picist. When blood pumps it goes into the lungs and to the body.