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Question
You have all heard the ‘tick tick’ of the clock. Have you seen a doctor using a stethoscope to listen to our chest? What do you think she hears? Where is the sound coming from? Is there a clock inside your chest that keeps ticking away?
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Solution
Yes, I have seen a doctor using a stethoscope to listen to our chest. She hears the heartbeat. The sound of the heartbeat comes from the heart while it pumps blood to the other parts of the body. No, it's not a clock to keep ticking away, it’s the heart that is beating.
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