Anatomic components of the interventricular septum

A schematic presentation of the three main anatomic components of the interventricular septum as seen from the morphologic left ventricle (A) and the morphologic right ventricle (B). Component 1: septum of the atrioventricular canal; Component 2: septum of the muscular septum; and Component 3: parietal band or distal conal septum.