What work does the heart do tirelessly
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The heart works tirelessly – more than 2.5 billion times over an average lifetime – to pump blood around the body. ... When you exercise, your heart beats more quickly. This is because your muscles are working harder and need more oxygen to keep going.
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The heart works tirelessly – more than 2.5 billion times over an average lifetime – to pump blood around the body. ... When you exercise, your heart beats more quickly. This is because your muscles are working harder and need more oxygen to keep going
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