Which component is NOT part of the heart's conduction system?

The component that is not part of the heart's conduction system is the coronary arteries. The heart's conduction system consists of key structures that generate and conduct electrical impulses, facilitating the rhythmic contraction of the heart muscles. The sinoatrial (SA) node serves as the primary pacemaker, initiating the heartbeat. The atrioventricular (AV) node acts as a gatekeeper, controlling the electrical impulses between the atria and ventricles, ensuring proper timing for contraction. The Bundle of His is responsible for transmitting impulses from the AV node to the ventricles, allowing coordinated contraction.

On the other hand, coronary arteries are responsible for supplying blood to the heart muscle itself. They play a vital role in providing oxygen and nutrients necessary for the heart tissues to function, but they do not participate in the conduction of electrical signals that regulate the heartbeat. This distinction highlights the specialized nature of the conduction system components compared to the coronary arteries, which belong to a different functional system within the cardiovascular architecture.