Heart beat originates from

Pacemaker

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Cardiac muscles

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Left atrium

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Right ventricle

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Solution

The correct option is A Pacemaker
The heart beat originates from sino-atrial node found in the upper part of the right auricle. It is a specialised type of cell, which generate the impulses required to start the first heart beat. Hence, it is known as the natural pacemaker of the heart.
So, the correct answer is option A.

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The impulse of heart beat originates from ___

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