Question
Cardiac impulse
Answer :
Word Count : 364
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The cardiac impulse, also known as the heart’s electrical impulse, is the signal that initiates and regulates the heartbeat. It originates in a specialized group of cells called the sinoatrial (SA) node, located in the upper part of the right atrium. The SA node acts as the natural pacemaker of the heart, generating electrical impulses spontaneously at regular intervals. These impulses spread across the atria, causing them to contract and push blood into the ventricles. After passing through the atria,
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