muscle fibres distributed throughout the heart walls
muscle fibres found only in the ventricle wall
nerve fibres distributed in ventricles
nerve fibres found throughout the heart
Solution
Bundle of His is a network of muscle fibres, found in the walls of ventricles. They originate from AV node and further give rise to Purkinje fibres. This helps in maintaining the rhythmic contraction of the ventricles.
Related Theory
Bundle of His is a collection of specialized heart muscle cells for electrical conduction while Purkinje fibres are thin filaments originating from the left posterior fascicle and left anterior fascicles that help in distributing impulses to the ventricular muscles.