- atrioventricular valve - either of two heart valves through which blood flows from the atria to the ventricles; prevents return of blood to the atrium
--1 is a kind of heart valve, cardiac valve
--1 has part: papillary muscle
--1 has particulars:mitral valve, bicuspid valve, left atrioventricular valve; tricuspid valve, right atrioventricular valve