what is SA node and what is it function
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s a node is a centre in the heart and it generates nerve impulse
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Explanation:
The heart's natural pacemaker – the SA node – sends out regular electrical impulses from the top chamber (the atrium) causing it to contract and pump blood into the bottom chamber (the ventricle). The electrical impulse is then conducted to the ventricles through a form of 'junction box' called the AV node.
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