Purkinje fibres arise from

Options

A. Apex of ventricles
B. Middle of ventricles
C. Anterior part of atria
D. Posterior part of atria

Answer

**Step-by-Step Solution:**

1. **Understanding Purkinje Fibres:**
- Purkinje fibres are specialized conducting fibres in the heart that play a crucial role in the electrical conduction system, helping to maintain a consistent heart rhythm and generating heart impulses.

2. **Location of Purkinje Fibres:**
- Purkinje fibres are located in the inner ventricular walls of the heart.

3. **Origin of Purkinje Fibres:**
- The Purkinje fibres arise from the bundle of His, which is a key component of the heart's electrical conduction system.

4. **Pathway of Electrical Conduction:**
- The bundle of His originates from the atrioventricular (AV) node. It then divides into the right and left bundle branches, which are situated in the interventricular septum.

5. **Formation of Purkinje Fibres:**
- The right and left bundle branches further give rise to the Purkinje fibres, which penetrate into the myocardium (the muscular layer) of the ventricles.

6. **Conclusion:**
- Therefore, Purkinje fibres arise from the bundle of His, which is derived from the AV node.

**Final Answer:**
Purkinje fibres arise from the bundle of His.

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