In the healthy heart, the electrical impulses that cause contraction of the cardiac muscle are initiated in the:

Question

Quizplus · Accepted Answer

The sinoatrial (SA) node, located in the right atrium, is considered the natural pacemaker of the heart. It generates electrical impulses that initiate the contraction of the cardiac muscle, beginning with the atria followed by the ventricles. The other options (B, C, and D) are involved in the conduction of the impulses, but they do not initiate them.

In the Healthy Heart, the Electrical Impulses That Cause Contraction