The function of the chordae tendineae and papillary muscles is to hold the AV valves wide open during diastole to ensure complete ventricular filling.

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The function of the chordae tendineae and papillary muscles is to prevent the AV valves from prolapsing (flipping inside out) during ventricular contraction, ensuring that blood flows in one direction from the atria to the ventricles. They do not hold the AV valves open during diastole, as this would result in regurgitation of blood back into the atria.

The Function of the Chordae Tendineae and Papillary Muscles Is