the adductor longus muscle of the thigh is named for its ability to
Adductor longus muscle Its main actions is to adduct and laterally rotate the thigh; it can also produce some degree of flexion/anteversion.[1]
Frog The muscular system has been similarly modified. The hind limbs of ancestral frogs presumably contained pairs of muscles which would act in opposition (one muscle to flex the knee, a different muscle to extend it), as is seen in most other limbed animals. However, in modern frogs, almost all muscles have been modified to contribute to the action of jumping, with only a few small muscles remaining to bring the limb back to the starting position and maintain posture. The muscles have also been greatly enlarged, with the main leg muscles accounting for over 17% of the total mass of the frog.[41]