Bundle of His is a network of

Options

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

Explanation

**Step-by-Step Solution:**

1. **Understanding the Bundle of His**: The Bundle of His, also known as the atrioventricular bundle, is a specialized structure in the heart's conduction system. It is responsible for transmitting electrical impulses from the atrioventricular (AV) node to the ventricles.

2. **Location and Function**: The Bundle of His is located in the interventricular septum, which is the wall separating the left and right ventricles of the heart. It plays a crucial role in coordinating the contraction of the ventricles.

3. **Structure of the Bundle of His**: The Bundle of His consists of specialized cardiac muscle fibers that are modified to conduct electrical signals. It branches into the right and left bundle branches, which further spread into Purkinje fibers that innervate the ventricular walls.

4. **Role in Heart Contraction**: When the sinoatrial (SA) node generates an impulse, it travels to the AV node and then to the Bundle of His. This initiates the contraction of the ventricles, allowing for effective pumping of blood.

5. **Conclusion**: The Bundle of His is a network of specialized nerve fibers (or conducting fibers) that facilitate the conduction of electrical impulses in the heart, leading to coordinated contractions of the ventricles.

**Final Answer**: The Bundle of His is a network of specialized nerve fibers.

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