BUNDLE OF HIS AND BRANCHES
The Bundle of His (H) receives the wave of depolarization from the A-V node. The bundle passes down into the interventricular septum. Here the bundle divides into the right and left bundle branches (B). These branches continue to divide forming the Purkinje fibers which carry the wave to every part of the ventricular myocardium. The fibers making up the bundle and bundle branches have a wider diameter and more numerous gap junctions than typical cardiac cells. As a result, they carry the wave at a great speed throughout the ventricular myocardium.