Select the letter of the choice that best completes the statement. The pacemaker of the heart is known as thea. SA node.b. AV node.c. bundle branches.d. Purkinje fibers.
Select the letter of the choice that best completes the statement. The pacemaker of the heart is known as the
a. SA node.
b. AV node.
c. bundle branches.
d. Purkinje fibers.
Cardiovascular system’s organ that functions to pump the blood is known as the heart. It is anatomically divided into four chambers and comprises of walls made of cardiac muscles, also called myocardium. An electrical device used to regulate heart rhythms is called a pacemaker.
The heart region that produces electrical impulses that stimulate the heart to beat is the sinoatrial node (SA node). It lies in the right atrium wall's upper part and consists of clusters of cells. It is also known as the heart's natural pacemaker.
Hence, the option 'a' is correct.
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