What is the function of the bundle branches in the heart?

The bundle branches play a crucial role in the heart's electrical system, specifically in conducting electrical impulses through the ventricles. Once the electrical impulse originates in the sinoatrial (SA) node and travels through the atrioventricular (AV) node, it reaches the bundle of His, which divides into the right and left bundle branches. These branches spread the electrical signal quickly throughout the ventricles, allowing them to contract in a coordinated manner. This is essential for effective pumping of blood to the lungs and the rest of the body. The function of the bundle branches ensures that both ventricles contract simultaneously, which is vital for maintaining proper heart rhythm and efficient blood circulation.