ANATOMY

Detailed explanation-1: -septum (SEP-tum): The septum is a thick wall of muscle that divides the heart. It separates the left and right sides of the heart.

Detailed explanation-2: -The interatrial septum is located between the right and left atria. In the fully formed heart, the interatrial septum has a central depression called the oval fossa (i.e., fossa ovalis), which is a remnant of the foramen ovale, a structure that connected the atria during fetal development.

Detailed explanation-3: -1 Introduction. The ventricular septum is a thick structure comprised of discrete muscular bands that separates the left and right ventricles, and contributes to cardiac function.