<unk>  (or ventricular<unk> , or during development<unk>  inferius) is the stout wall separating the lower chambers (the ventricles) of the heart from one another.
The ventricular<unk>  is directed obliquely backward and to the right, and is curved with the convexity toward the right ventricle: its margins correspond with the anterior and posterior longitudinal sulci.
Interventricular septum
Interatrial septum
Tricuspid valve
Atrioventricular canal
Atrioventricular node
Bundle of Kent
Atrioventricular nodal branch
Sinoatrial node