Which heart valve lies between the right atrium and the right ventricle?

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

Answer: (B)

The main idea here is knowing where each heart valve sits to control blood flow between chambers and into the great vessels. The valve that sits between the right atrium and the right ventricle is the tricuspid valve. It opens to let blood move from the right atrium into the right ventricle, and it closes when the ventricle contracts to prevent blood from flowing back into the atrium. The other valves are in different locations: the mitral valve lies between the left atrium and left ventricle, the aortic valve is at the exit of the left ventricle into the aorta, and the pulmonary valve is at the exit of the right ventricle into the pulmonary artery. So, for the space between the right atrium and right ventricle, the tricuspid valve is the correct one.