Q.28 Sketch the diagram of conducting system of
human heart. Show sinuatrial node and
atrioventricular node in the diagram and write
their function.
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Explanation:
The SA node (called the pacemaker of the heart) sends out an electrical impulse and the upper heart chambers (atria) contract.
The AV node sends an impulse into the ventricles and the lower heart chambers (ventricles) contract or pump.
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