Legs are the paired lower limbs of the human body that extend from the hips down to the feet. Each leg is composed of several key parts: the thigh, which contains the femur—the longest and strongest bone in the body; the knee joint, which connects the thigh to the lower leg; the lower leg, made up of the tibia and fibula bones; the ankle, which allows foot movement; and the foot itself, made up of numerous bones, muscles, and tendons that provide support and balance. Legs bear the weight of the body and are crucial for locomotion, enabling actions such as standing, walking, running, jumping, and climbing. A complex system of muscles, ligaments, and nerves work together to control movement and maintain balance. Legs also contribute to posture and play a role in non-verbal communication through body language and stance.