What valve lies between the right atrium and the right ventricle?

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The valve between the right atrium and the right ventricle is the tricuspid valve. It is one of the heart’s atrioventricular valves and has three cusps. During the heart’s relaxation phase, blood flows from the right atrium into the right ventricle and the tricuspid valve opens to allow this. When the right ventricle contracts, the valve closes to prevent blood from flowing back into the atrium. The leaflets are anchored by chordae tendineae to papillary muscles in the ventricle, which helps prevent leaflet prolapse during contraction. The other valves are located at the outflow tracts and on the opposite side of the heart: the pulmonary valve sits between the right ventricle and the pulmonary artery, the aortic valve sits between the left ventricle and the aorta, and the mitral valve sits between the left atrium and the left ventricle.