A prosthesis is an artificial device designed to replace a missing body part, such as a leg, arm, or even a tooth. These devices help individuals regain functionality and improve their quality of life. For example, a person with a missing limb can use a prosthetic leg to walk again, allowing them to participate in daily activities and sports. Modern prostheses are often made from advanced materials and can be customized to fit the user's needs. Some even incorporate technology, like bionic limbs, which can be controlled by the user's muscles. This innovation helps people feel more connected to their bodies and enhances their independence.