Final answer:
A prosthesis is an artificial body part used as a medical treatment to replace missing or damaged body parts, such as limbs or joints.
Step-by-step explanation:
A prosthesis is an artificial body part. It is a medical treatment used to replace a missing or damaged body part, such as a limb or joint. Prostheses are designed to enhance mobility and functionality, allowing individuals to perform daily activities more comfortably. For example, joint replacement surgery involves the use of artificial joint components to replace worn or damaged parts of the joint.