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It is recorded that the human heart beats around 2.5billion times in an average lifetime ,about 100,000 times a day and around 70 times every minute. It circulates about 7 litres every day, bringing a constant supply of oxygen and nutrients to our tissues and removing waste and carbon dioxide. It works like a motorised water pump. In this case it is automatic until the heart fails. So you see it is very important to our survival.