The sino-atrial (SA) node is a specialized bundle of neurons that have the ability to generate action potential without any external stimuli. This action potential is responsible for initiating and maintaining the rhythmic contraction of the heart. Due to this ability, the SA Node is called the pacemaker.
Answered by Pragya Singh | 1 year agoDraw a standard ECG and explain the different segments in it.
Define a cardiac cycle and the cardiac output.
What is the significance of atrioventricular nodes and atrioventricular bundles in the functioning of the heart?