The heartbeat is regulated by a small node of cardiac muscles called
A
Pericardium
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B
Ventricle
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C
Tricuspid valve
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D
Pacemaker
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Solution
The correct option is C Pacemaker A small node of specialized tissue is located int he upper right corner of right ventricle called as SA node. It is known as natural pacemaker of heart as it is responsible for initiation and regulation of heart beat.