Question

sino atrial node is known as the pacemaker of the heart justify​

Answer 1

Answer:

The sino-atrial (SA) node is a specialised bundle of neurons located in the upper part of the right atrium of the heart. ... Since the SA node initiates and maintains the rhythmicity of the heart, it is known as the natural pacemaker of the human body

Explanation:

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Answer 2

Answer:

The sino atrial node is known as the pacemaker of heart because it sends certain impulses around the heart which control the speed of heart. If the rate of impulses is more than your heart beat increases and if the rate of impulses is is less than your heartbeat decreases