MEDICAL PHYSIOLOGY

Detailed explanation-1: -Your sinoatrial node is sometimes called your heart’s natural pacemaker . It sends the electrical impulses that start the heartbeat. The SA node is in the upper part of your heart’s right atrium.

Detailed explanation-2: -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-3: -The cells of the SA node at the top of the heart are known as the pacemaker of the heart because the rate at which these cells send out electrical signals determines the rate at which the entire heart beats (heart rate).

Detailed explanation-4: -The sinoatrial node is perhaps one of the most important tissues in the entire body: it is the natural pacemaker of the heart, making it responsible for initiating each-and-every normal heartbeat. As such, its activity is heavily controlled, allowing heart rate to rapidly adapt to changes in physiological demand.