The bundle branches then divide into an extensive system of purkinje fibres that conduct the impulses at high velocity (about 4m/sec) throughout the ventricles. This result in rapid depolarization of ventricular myocytes throughout both ventricles.

Answer:

The maximum conduction velocity among the components of the conducting system of the heart is found in the Purkinje fibers.

Explanation:

The conducting system of the heart ensures that the electrical impulse is transmitted from the SA node to the atria, then to the AV node, and finally to the ventricles, causing them to contract. The components of the conducting system of the heart are as follows:

1. SA node: It is the pacemaker of the heart and initiates the electrical impulse. The conduction velocity of the SA node is approximately 1 m/s.

2. AV node: It is located in the atrial septum and receives the electrical impulse from the SA node. It slows down the impulse before transmitting it to the ventricles. The conduction velocity of the AV node is approximately 0.05 m/s.

3. Bundle of His: It is a group of specialized muscle fibers that conduct the electrical impulse from the AV node to the ventricles. The conduction velocity of the bundle of His is approximately 1 m/s.

4. Purkinje fibers: They are specialized muscle fibers that rapidly conduct the electrical impulse to the ventricular myocardium, causing the ventricles to contract. The conduction velocity of the Purkinje fibers is approximately 4 m/s.

Hence, the Purkinje fibers have the maximum conduction velocity among the components of the conducting system of the heart.