The human legs are exceptionally long and powerful as a result of their exclusive specialization for support and locomotion—in orangutans the leg length is 111% of the trunk; in chimpanzees 128%, and in humans 171%.
Leg, limb or appendage of an animal, used to support the body, provide locomotion, and, in modified form, assist in capturing and eating prey (as in spiders and insects). In four-limbed vertebrates all four appendages are commonly called legs, but in bipedal animals only the lower two are so called.
Many different muscles are located in the lower leg between the knee and the ankle. Some of the main ones include: This article describes the anatomy of the lower leg muscles. It covers where they're located and what they do. Your muscles in the lower leg are supported by two very strong, long bones: the fibula and the tibia (shinbone).