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Sino-atrial node is called the pacemaker of our heart. Why?

Sino-atrial node is called the pacemaker | Class 11 Biology Chapter Body Fluids and Circulation, Body Fluids and Circulation NCERT Solutions

Question: Sino-atrial node is called the pacemaker of our heart. Why?

Answer:

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.

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Comments

Sagar
2019-10-18 20:57:51

Very Very helpfulðððð

Mahi
2019-02-23 14:49:53

Helpful

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Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 10: Sino-atrial node is called the pacemaker of our heart. Why?....

Sino-atrial node is called the pacemaker | Class 11 Biology Chapter Body Fluids and Circulation, Body Fluids and Circulation NCERT Solutions

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