Definitions for "CORONARY SINUS"
a wide venous channel on the posterior surface of the heart that collects the blood from the coronary circulation and returns it to the right atrium
a short sinus receiving most of the veins of the heart; empties into the right atrium
Located on the right atrium (one of four chambers of the heart). It is the opening through which most of the venous drainage of the heart is returned to circulation.