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What is the function of heart in our body?
 The role of the heart is to pump oxygen-rich blood to every living cell in the body. In order for the heart to deliver oxygenated blood to all cells, blood is pumped through arteries. Veins bring deoxygenated blood cells to the lungs, which then are oxygenated, and then sent back to heart. In this way, a continuous cycle is formed of the heart pumping oxygenated blood and deoxygenated blood out to their designated destinations, and therefore the heart maintains the circulatory system. The heartbeat is made up of systole and diastole, which are the two stages of a heartbeat.


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