Which of the following structures is last in the conduction pathway of the heart?

The Purkinje fibers represent the last structures in the conduction pathway of the heart. Their primary role is to distribute the electrical impulses that trigger the contractions of the ventricles. Once the electrical signal travels through the atrioventricular (AV) node, it progresses to the AV bundle (or Bundle of His), then splits into right and left bundle branches, ultimately leading to the Purkinje fibers. The Purkinje fibers ensure that the electrical impulse rapidly spreads throughout the ventricular myocardium, coordinating a strong and synchronized contraction of the ventricles. This final step in the conduction system is crucial for effective heart function, as it allows for maximum blood ejection during each heartbeat.