The impulse to begin each heartbeat of the heart comes from the

Question

Quizplus · Accepted Answer

The sinoatrial node (SA node) is known as the natural pacemaker of the heart because it initiates the electrical impulses that cause the heart to contract and pump blood. These impulses spread throughout the atria and are then transmitted to the atrioventricular node, bundle of His, and Purkinje fiber system, causing the ventricles to contract and completing one heartbeat. However, the initial impulse comes from the SA node, making option D the correct choice.

The Impulse to Begin Each Heartbeat of the Heart Comes