Interatrial septum

Definition

The interatrial septum is a thin wall of tissue that separates the heart's two upper chambers, the left and right atria. It plays a crucial role in maintaining proper blood flow direction within the heart during the cardiac cycle.

Related terms

Atria:

The two upper chambers of the heart, responsible for receiving blood that comes into the heart.

Ventricles:

The two lower chambers of the heart, which pump blood out to the body and lungs.

Cardiac Cycle:

The sequence of events that occurs in one complete beat of the heart, involving both relaxation and contraction phases to circulate blood effectively