The thigh muscles that flex the leg at the knee are supplied by what artery?

The Hamstrings are the muscles of the posterior thigh that flex the knee. The Hamstring Group consists of the semimembranosus, semitendonosus, and long head of the biceps femoris. The short head of the biceps femoris contributes to flexion of the knee but is not considered part of the Hamstring group due to its separate innervation.