What is the correct order the pathway that the excitation moves throughout the heart?

Question

Quizplus · Accepted Answer

The correct pathway of the excitation through the heart starts at the SA node, which is the natural pacemaker of the heart. The electrical impulse then travels through the atria, leading to atrial contraction. The impulse then passes through the AV node, which acts as a gatekeeper, and causes a slight delay to allow the ventricles to fill with blood. From the AV node, the impulse travels through the bundle of His, which splits into the left and right bundle branches, and down into the Purkinje fibers. This causes the ventricles to contract, resulting in the ejection of blood from the heart. Therefore, option D is the correct choice as it represents the correct order of the pathway that the excitation moves throughout the heart.

What Is the Correct Order the Pathway That the Excitation