ANATOMY
CHEST AND CARDIOVASCULAR
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Atrioventricular node
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Sinoatrial node
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Bundle of his
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Purkinje Fibers
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Detailed explanation-1: -The sinus node continuously generates electrical impulses, thereby setting the normal rhythm and rate in a healthy heart. Hence, the SA node is referred to as the natural pacemaker of the heart.
Detailed explanation-2: -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.
Detailed explanation-3: -The heart’s natural pacemaker is a cluster of cells. Doctors refer to it as the sinoatrial (SA) node or sinus node. The SA node produces electrical impulses that set the heart rate and rhythm. The SA node is one of the most important tissues in the body as it initiates every heartbeat.