Choose the correct answer from the alternatives given.
The impulses for heart beat originate in:

A.VN.

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SAN.

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bundles of His

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fibres of Purkinje

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Solution

The correct option is B SAN.
The sinoatrial node (SAN) is the impulse-generating (pacemaker) tissue located in the right atrium of the heart, and thus the generator of normal sinus rhythm. It is a group of cells positioned on the wall of the right atrium, near the entrance of the superior vena cava.
So, the correct option is 'SAN'.

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