One of the four structures within the heart that prevent backflow of blood by opening and closing with each heartbeat. The valves include two semilunar valves, the aortic and pulmonary; the mitral or bicuspid valve; and the tricuspid valve. The valves permit blood flow in only one direction. [TFD][VHOG]

uberon

stomodaeal valve, heart valves, heart valve, valvule, cardiac valve

Extensive conservation of valve developmental mechanisms also has been observed among vertebrate species including chicken, mouse, and human.[well established][VHOG]

UBERON:0000946

Rector et al: One might be tempted to define 'heart valve' equivalently to 'valve in the heart', and 'valve' as a 'structure which functions as a valve'. But this combination results in the 'foramen ovale' being classified as a kind of 'heart valve', since it is undoubtedly located in the heart and functions as a valve

• cusp of cardiac valve
• cardiac valve leaflet