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]
Arrector pili muscle Contraction of the muscles has a number of different purposes. Its principal function in the majority of mammals is to provide insulation: air becomes trapped between the erect hairs, helping the animal retain heat. Erection of the porcupine's long, thick hairs causes the animal to become more intimidating, scaring predators. Pressure exerted by the muscle may cause sebum to be forced along the hair follicle towards the surface, protecting the hair.