The<unk>  is an area of specialized tissue between the atria and the ventricles of the heart, which conducts the normal electrical impulse from the atria to the ventricles.
Atrioventricular node
Sinoatrial node
Atrioventricular nodal branch
Interventricular septum
Atrioventricular canal
Bundle of Kent
Tricuspid valve
Interatrial septum