Chordae Tendineae

The chordae tendineae are strong, fibrous strings attached to the leaflets (or cusps) of the heart on the ventricular side; i.e., the lower chamber. These strings originate from small mounds of muscle tissue, the papillary muscles, which project inward from the walls of the ventricle. When the cusps close, the chordae tendineae prevent them from swinging back into the atrium cavity (the upper chamber).


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