The AV valves are attached to the ventricular wall with the help of

The atrioventricular (AV) valves, including the mitral valve (left AV valve) and the tricuspid valve (right AV valve), are connected to the ventricular wall via chordae tendineae. These are thin, fibrous cords composed of collagen that originate from the papillary muscles, which are located within the ventricles. The chordae tendineae extend from the papillary muscles to the edges of the AV valve leaflets. Their primary function is to prevent the inversion or prolapse of the AV valve leaflets into the atria during ventricular contraction. This mechanism ensures unidirectional blood flow from the atria to the ventricles during the cardiac cycle.