The chordae tendinae and papillary muscles function to help prevent the cusps of the mitral (bicuspid) and tricuspid valve from prolapsing into the atria during cardiac systole.
They both prevent the valves in the heart from turning inside out due to the high pressure in the ventricles during the systole phase of the cardiac cycle.
The chordae tendinae connect the bicuspid and tricuspid valves to the papillary muscles. the tendinae keep the valves shut during systole. During diastole, when the chambers fill with blood, the...