Sino-atrial node is called the pacemaker of o | vedclass

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(B) The sino-atrial $(SA)$ node is a specialized mass of cardiac muscle fibers located in the upper wall of the right atrium. It has the unique abilit

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It regulates the heart rate by initiating rhythmic contractions.

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(B) The sino-atrial $(SA)$ node is a specialized mass of cardiac muscle fibers located in the upper wall of the right atrium. It has the unique ability to generate action potentials without any external stimuli,a property known as autorhythmicity. Because the $SA$ node initiates and maintains the rhythmic contractile activity of the heart,it is referred to as the natural pacemaker of the human heart.

Column-$I$	Column-$II$
$P$. Interatrial septum	$I$. Thick fibrous tissue
$Q$. Interventricular septum	$II$. Thin wall
$R$. Atrioventricular septum	$III$. Thick wall

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

Similar Questions

What is the significance of the time gap in the passage of the action potential from the sino-atrial node to the ventricle?

The $SAN$ (Sino-atrial node) can generate action potentials at a rate of:

The tricuspid valve is found between ...............

Match the following columns:

Column-$I$ Column-$II$

$P$. Interatrial septum $I$. Thick fibrous tissue

$Q$. Interventricular septum $II$. Thin wall

$R$. Atrioventricular septum $III$. Thick wall

Who performed the first heart transplant?

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