Sino-atrial node is called the pacemaker of our heart. Why?
The sino-atrial (SA) node is a specialized package of neurons positioned withinside the top a part of the proper atrium of the heart. The cardiac impulse originating from the SA node triggers a series of electrical occasions withinside the heart, thereby controlling the series of muscle contraction that pumps blood out of the heart. Since the SA node initiates and keeps the rhythmicity of the heart, it's far called the herbal pacemaker of the human body.
