Question

Bundle of His is a network of

• A. muscle fibres distributed throughout the heart walls
• B. muscle fibres found only in the ventricle wall
• C. nerve fibres distributed in ventricles
• D. nerve fibres found throughout the heart

Answer 1

Answer: (B)

Bundle of His is a network of cardiac muscle fibres found only in the ventricle wall. The bundle of His in continuation of the AV node gives off a left bundle branch at the top of the interventricular septum and continues as the right bundle branch. It is a part of conducting system along with other parts like SA node, internodal atrial pathways, atrioventricular node, Purkinje system.
$SA\to$ Impulse $\to$ Atrial pathways $\to AV$ node $\to$ Bundle of His $A\underset{\text{ Through its }}{\overset{\text{ branches }}{\to }}B$ Purkinje system $\to$ Ventricular muscle.