ANATOMY

Detailed explanation-1: -The interatrial septum is a thin wall of tissue that separates the right and left atria of the heart. In adult life, its main function is to separate the two atrial chambers so that there is no shunting of blood between them.

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 interatrial septum is a thin fibromuscular wall situated between the right and left atria of the heart. In adults, the interatrial septum has a centrally positioned depression known as oval fossa. This depression marks the place where foramen ovale was placed during fetal development.