The heart is also known as the blood-pump of the body. It pumps blood through the circulatory system to all parts of the body. The blood carries food and oxygen to the cells and carries away carbon dioxide and waste materials.
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The right hand side of the heart receives de-oxygenated blood from the body tissues, and pumps it to the lungs. The left-hand side of the heart receives oxygenated blood from the lungs and pumps it into the body, so that the oxygen can be delivered to cells.
The funcition of the heart is to pump blood around the body to keep us alive. For more info search on the internet (e.g Google or Answers.com) about the funciton of the heart and blood vessle and/or the circilarotery system. sorry about the spelling :) hope it helps!
The function of the heart is to pump blood which carry materials that is essential for the various organs of our bodies to function.