The chordae tendineae (tendinous cords), colloquially known as the heart strings, are inelastic cords of fibrous connective tissue that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart. Chordae tendineae. The chordae tendineae connect the valves to the heart muscle.
Source: https://www.instagram.com/p/CTWHSFNosEb/?igshid=MjU0Y2ZlMmY=