Which is responsible for intiating and maintaining the rhythmic contractile activity of the heart?

Sino-atrial node(SAN)

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Atrio-ventricular node(AVN)

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Purkinje fibers

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Bundle of his

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Solution

The correct option is A Sino-atrial node(SAN)
The correct answer is A
The human heart is a myogenic heart, it has a special muscular tissue which generates impulses called as SA node or sinoatrial node, It is present in the right upper corner of the right atrium. Sino atrial node is also called as the pacemaker of the heart.

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