Question

What is AVN?

Answer 1

Conducting system of the human heart:

1. In the human heart, small groups of specialized neuromuscular cells are present within the myocardium.
2. These initiate and conduct impulses, due to which a coordinated and synchronised contraction of the heart muscles is seen.
3. The conducting system of the human heart has four components namely- Sinoatrial node (SAN), atrioventricular node (AVN), and Bundle of His and Purkinje fibres.

Atrioventricular node (AVN):

1. It is a small mass of self-excitatory neuromuscular tissue situated in the wall of the atrial septum near the atrioventricular valves of the heart.
2. It is also known as the node of Twara and Aschoff.
3. It is the pacesetter of heart.