How called the flaps of tissue forming the AV valves?

The tricuspid valve.

The string-like structures that anchor the valve flaps of the AV valve are called the chordae tendinae, which attach to the papillary muscles of the ventricles. Interestingly enough, the bundle...

the bicuspid valve.

Bicuspid valve.. a birth defect of the aortic valve.

tricuspid