They connect the papillary muscles to the tricuspid valve and the mitral valve in the heart. The chordate tendineae are string-like in appearance and are sometimes referred to as heart strings.chordae tendineae transmit the resulting increase and decrease in tension to the respective valves, causing them to open and close.
1 Additional Answer
The function of the heart strings is to close the valves which separate the ventricles from the atria to prevent the back flow of blood. They ensure that blood is pushed via the pulmonary and aortic valves so that it circulates through the lungs and the body.