Assertion: valve | /r/HasAspect | flap
Facets:
value: except for the mitral valve
type: OTHER
value: typically
type: DEGREE
Source sentences:
text: Each valve has flaps (leaflets or cusps) that open and close once during each heartbeat.
text: Each valve typically has three flaps, except for the mitral valve, which has two.
text: Each valve has flaps (cusps or leaflets) that open and close once during each heartbeat.
text: Each valve has flaps (leaflets or cusps) that open and close once during each heartbeat.