What is the function of the AV node?

The function of the AV node, or atrioventricular node, is primarily to conduct impulses from the atria to the ventricles. This action is crucial because it allows for a coordinated contraction between the chambers of the heart. When the atria contract, they push blood into the ventricles; the AV node ensures that there is an appropriate delay before the ventricles contract. This delay is important as it allows the ventricles to fill with blood completely from the atria before they start their contraction, optimizing the heart's efficiency in pumping blood.

In addition to this conducting role, the AV node also plays a part in the overall electrical conduction system of the heart by influencing the timing of contractions, contributing to effective blood flow. Thus, the ability of the AV node to mediate this communication between the atria and ventricles is vital for the normal functioning of the heart. Understanding this function helps in recognizing its significance in maintaining a proper rhythm and pace of heart activity.