Interventricular septum

The interventricular septum is the robust muscular wall that separates the right and left ventricles of the heart.

It is composed of two main parts: the muscular part, which constitutes the majority of its mass and extends from the cardiac apex to the base, and the membranous part, a small, thin, fibrous portion located superiorly near the atrioventricular junction and adjacent to the aortic and tricuspid valves