WHAT IS THE SIGNIFICANCE OF AV NODE AND AV BUNDLE IN THE FUNCTIONING OF THE HEART.

• The atrioventricular (AV) node is a section of nodal tissue that lies on the right side of the partition that divides the atria, near the bottom of the right atrium.

Function: 

• Delays cardiac impulses from the sinoatrial node to allow the atria to contract and empty their contents first.

• Relays cardiac impulses to the atrioventricular bundle.

• The atrioventricular bundle is a bundle of fibers that are located within the septum of the heart.

Function: 

• Carries cardiac impulses down the septum to the ventricles via the Purkinje fibers.