Final answer:
The left bundle branch divides into two bundles to supply the left ventricle.
Step-by-step explanation:
The bundle branch that divides into two bundles to supply the left ventricle is the left bundle branch. The left bundle branch has two fascicles and it is considerably larger than the right bundle branch since the left ventricle is larger than the right ventricle. The left bundle branch descends and reaches the apex of the heart where it connects with the Purkinje fibers.