A "leg" is a limb found in many animals, including humans, that is used for support and movement. In humans, each leg consists of several parts, including the thigh, knee, calf, and ankle. Legs enable walking, running, and jumping, playing a crucial role in mobility. In addition to their function in movement, legs also help maintain balance and stability. In the animal kingdom, different species have evolved various leg structures, such as the long legs of giraffes for reaching high foliage or the powerful legs of frogs for jumping.