a muscle is called the pacemaker of the heart . Name it. Why do we call it so?
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The SA (sinoatrial) node is called pacemaker because it contains a group of cells in the wall of the right atrium that have the ability to spontaneously initiate the electrical impulse that leads to the contraction of the heart.
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The SA node (SA stands for sinoatrial) is called the pacemaker of the heart. The heart beat initiates from S.A. node.
It is one of the chief elements in the cardiac conduction system, which controls the heart rate by generating electrical impulses.
The SA node sends electrical impulses via the heart muscle, resulting in the contraction in heart pumping blood throughout the body.
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