Question

Valve surrounding opening of coronary sinus is

• A. Thebesian valve
• B. Tricuspid valve
• C. Mitral valve
• D. Semilunar valves

Answer 1

The correct option is A Thebesian valve

Coronary sinus is the largest coronary vein and it drains the deoxygenated blood into the right atrium posteriorly from the heart muscles. Along with the vena cavas, coronary sinus plays an important role in bringing the deoxygenated blood from the tissues to the heart. Thebesian valve is the valve of the coronary sinus. Tricuspid valve is the valve with three muscular cusps which is present between the right atrium and the right ventricle. It prevents the backflow of blood from the right ventricle to the right atrium. Mitral valve, which is also known as the bicuspid valve, is the valve which contains two muscular cusps. It is found between the left atrium and the left ventricle. Semilunar valves are the valves of the pulmonary artery (pulmonary semilunar valve) and the aorta (aortic semilunar valve).