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Why SA node is called pacemaker

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Why SA node is called pacemaker

Posted by Piyush Kumar 7 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Pratap Dash 7 years, 11 months ago

The sino-atrial (SA) node is a specialised bundle of neurons located in the upper part of the right atrium of the heart. The cardiac impulse originating from the SA node triggers a sequence of electrical events in the heart, thereby controlling the sequence of muscle contraction that pumps blood out 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. I hope u find this useful..

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