Which valve is located between the right atrium and right ventricle?

• A. Mitral valve
• B. Pulmonary valve
• C. Tricuspid valve
• D. Aortic valve

Answer: (C)

Valves ensure one-way blood flow between heart chambers. The passage from the right atrium to the right ventricle is controlled by the tricuspid valve, an atrioventricular valve on the heart’s right side. It has three cusps that open to let blood flow into the ventricle during relaxation, and it closes as the ventricle contracts to prevent backflow into the atrium. The chordae tendineae and papillary muscles help prevent the valve from bulging backward when the ventricle squeezes. Other valves are located at different connections: the mitral valve sits between the left atrium and left ventricle, the pulmonary valve sits at the exit of the right ventricle to the pulmonary artery, and the aortic valve sits at the exit of the left ventricle to the aorta.