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The pacemaker of the human heart is the

ABundle of His in ventricle wall
BPurkinje fibres in ventricle apex
CSino-atrial node in right atrium
DAtrio-ventricular node in septum
Answer & Solution
Correct answer: C. Sino-atrial node in right atrium
The SAN at the right upper corner of the right atrium generates the maximum action potentials per minute (70-75) and sets the rhythm. AVN, AV bundle and Purkinje fibres are conducting tissue downstream.
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