Coronary sinus

Definition

The coronary sinus is a large vein on the posterior side of the heart that collects blood from the heart muscle (myocardium) and returns it to the right atrium. It plays a crucial role in the circulation of blood in the heart's venous system.

Related terms

Myocardium:

The muscular tissue of the heart, responsible for contracting and pumping blood through the body.

Right Atrium:

One of the four chambers of the heart, which receives deoxygenated blood from the body through veins and pumps it into the right ventricle.

Venous System: The network of veins responsible for returning deoxygenated blood back to the heart and lungs for oxygenation