‘Heart of heart’ is called:

AV node

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Purkinje fibres

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Bundle of His

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SA node

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Solution

The correct option is D SA node
Sino-atrial node acts as the ‘pacemaker’ of the heart because it is capable of initiating impulse which can stimulate the heart muscles to contract.

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The course of blood from the heart to the lungs and back to the heart is called

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