The conduction of impulse takes from SA node to

AV node

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Bundle of His

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Purkinjee fibres

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Cardiac muscles

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Solution

The correct option is A AV node
Signals arising in the SA node (located in the right atrium) stimulate the atria to contract and travel to the AV node, which is located in the interatrial septum. After a delay, the stimulus diverges and is conducted through the left and right bundle of His to the respective Purkinje fibers for each side of the heart, as well as to the endocardium at the apex of the heart, then finally to the ventricular epicardium.
So, the correct answer is option A.

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