A "leg" is a part of the body that helps us stand, walk, and run. It is made up of bones, muscles, and joints, allowing for movement and support. Each leg has a thigh, knee, calf, and ankle, which work together to help us move efficiently. In addition to humans, many animals also have legs, such as dogs, cats, and horses. These legs are adapted to their specific needs, whether for running fast, climbing, or swimming. The study of legs and their functions can be found in fields like anatomy and biomechanics.