Bring out the significance of AV node and AV Bundle in the contraction of impulse during heartbeat

AV node helps in carrying the wave of depolarization from the atria(where it was generated in the SA node) to the ventricles (passing the atrio-ventricular septum).
AV bundle (running through the interventricular septum) helps in spreading of the depolarization wave all over the ventricles so the the ventricles contract and the blood is pumped in the arteries.

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