Q. ‘Heart of Heart’ is
A) SA-node
B) AV-node
C) Bundle of His
D) Purkinje fibres
Explanation
SA-node is located in the right atrial wall below the opening of the superior vena cava. It initiates each cardiac cycle and thereby sets the basic pace of the heart beat, hence, its name is ‘pacemaker’ or ‘heart of heart’.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.