cardiac valve semi-lunar valve EHDAA2:0001823 Extensive conservation of valve developmental mechanisms also has been observed among vertebrate species including chicken, mouse, and human.[well established][VHOG] EMAPA:35760 semilunar valves VHOG:0001393 semilunar valve MA:0002790 UBERON:0005623 The valves that gate the flow of blood from the ventricles into the aorta and pulmonary trunk. EHDAA:4408 Lacks chordae tendinae uberon