Bundle branches are specialized pathways in the heart's electrical conduction system. They are part of the atrioventricular (AV) bundle, which splits into two main branches: the right bundle branch and the left bundle branch. These branches help transmit electrical impulses from the AV node to the ventricles, ensuring coordinated heart contractions. The right bundle branch conducts impulses to the right ventricle, while the left bundle branch further divides into two parts, serving the left ventricle. Proper functioning of the bundle branches is crucial for maintaining a regular heartbeat and effective blood circulation throughout the body.