#atrioventricular_valve  either of two heart valves through which blood flows from the atria to the ventricles; prevents return of blood to the atrium
  supertype:  #cardiac_valve__cardiacvalve__heart_valve  a valve to control one-way flow of blood
  part:  #papillary_muscle
  subtype:  #mitral_valve__bicuspid_valve__left_atrioventricular_valve  valve with two cusps; situated between the left atrium and the left ventricle
  subtype:  #tricuspid_valve__tricuspidvalve__right_atrioventricular_valve  valve with three cusps; situated between the right atrium and the right ventricle; allows blood to pass from atrium to ventricle and closes to prevent backflow when the ventricle contracts

No statement uses or specializes #atrioventricular_valve; click here to add one.