THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -A wall of muscle called the septum separates the left and right atria and the left and right ventricles. These are referred to as the atrial and ventricular septum.

Detailed explanation-2: -The left and the right side of the heart is separated by a wall called septum. The partition between the chambers helps to avoid the mixing up of blood rich in oxygen with blood rich in carbon dioxide.

Detailed explanation-3: -The atrial septum is the tissue wall which separates the two upper chambers of human heart into right and left atrium. The atrial septum is a blade-shaped structure with a concave anterior margin that reflects the curve of the ascending aorta.