What part of the cardiac conduction system is located in the posterior wall of the right atrium,adjacent to the entrance of the superior vena cava?
A)AV bundle
B)Bundle branches
C)Purkinje fibers
D)AV node
E)SA node

Question

Quizplus · Accepted Answer

The SA node, or sinoatrial node, is located in the posterior wall of the right atrium, adjacent to the entrance of the superior vena cava. It acts as the natural pacemaker of the heart by initiating the electrical impulses that set the heart rate.

What Part of the Cardiac Conduction System Is Located in the Posterior