Artificial organ almost always preceded by extensive experiments with animals. Initial testing in humans is frequently limited to those either already facing death or who have exhausted every other treatment possibility. Artificial arms and legs, or prosthetics, are intended to restore a degree of normal function to amputees. Mechanical devices that allow amputees to walk again or continue to use two hands have probably been in use since ancient times, the most notable one being the simple peg leg. Since then, the development of artificial limbs has progressed rapidly. New plastics and other materials, such as carbon fiber have allowed artificial limbs
Murder for body parts is usually intended that the victim be mutilated while conscious, so that the medicine can be made more potent through the noises of the victim in agony. Mutilation does not take place in order to kill the victim, but it is expected that the victim will die of the wounds. Body parts excised mostly include soft tissue – eyelids, lips, scrota, labia – although there have been instances where entire limbs have been severed. These body parts are removed to be mixed with medicinal plants to create a medicine through a cooking process. The resulting medicine is sometimes consumed, but