What is the SA node in humans?
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The SA node is the hearts NATURAL PACEMAKER. Electrical impulses are generated there.It is also called SINUS NODE OR SINO ATRIAL NODE.
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Answer:The S.A. node or sino atrial node is the natural pacemaker of the heart.It is cluster of cells found in the
upper part of the wall of right atrium.The electrical impulses(heartbeats) are generated here.
Explanation:
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