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What is the significance of atrio-ventri...

What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?

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Atrio- ventricular node acts as pace-setter and generates the cardiac impulses which are conducted to the ventricular muscles through the atrio-ventricular bundle (also called Bundle of His) and the Purkinje fibres at the speed of 1-4 metre/ second.
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