Heart beat originates in :

Question

Heart beat originates in : (A) Purkinjes fibers (B) SA node (C) AV node (D) Chordae tendinae

Tardigrade Admin · Accepted Answer

The heart beat originates from the Sinuatrial node (SA node-pacemaker) which lies in the wall of right atrium near the opening of superior vena cava. The SA node is a mass of neuro muscular tissue.

Q. Heart beat originates in :

Purkinjes fibers

SA node

AV node

Chordae tendinae

The heart beat originates from the Sinuatrial node ( $S A$ node-pacemaker) which lies in the wall of right atrium near the opening of superior vena cava. The $S A$ node is a mass of neuro muscular tissue.