Where is the heart’s natural pacemaker located and what does it do?

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The natural pacemaker of the heart is the

Sinoatrial Node

. It is located above the right atrium near the opening of the superior vena cava.


sinoatrial node

generates rhythmical impulses first then it is relayed into the

atrioventricular node

located between the atrium and ventricle of the heart. In here, the impulses are delayed to allow blood from the atrium to fill into the ventricles. Impulses again are relayed to the

left and right bundle branches of the Purkinjie fibers

which conduct cardiac impulses throughout the parts of the left and right ventricles.


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