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what is heartbeat?

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what is heartbeat?

    • Posted by Aafiya Sadiq 5 years, 2 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 5 years, 2 months ago

    Heartbeat

    • The rhythmical contraction and expansion of heart muscles constitute heartbeat.
    • Doctors check the heart beat with the help of a device called as stethoscope.
    • Stethoscope has a chest piece, two ear pieces and a tube for joining the parts.
    • Stethoscope amplifies the sound of the heart.

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