Short Answer TypeHow much time auricular systole, ventricular systole and joint diastole persist separately?
One Word AnswersShort Answer TypeWhy S.A. node is called pacemaker of heart?
The SA node or sino-atrial node (SAN) is called the the natural pacemaker of the heart. It controls the heart rate by generating electrical impulses and then sending electrical signals through the heart muscle, causing the heart to contract and pump blood throughout the body.The heart beat originates from S.A. node and spreads to the walls of auricles which contract.
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