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 cadavers. These rumors are hard to substantiate, and may reflect continued, deep-held fears of the use of cadavers as commodities. Murder for body parts The murder of human beings for their body parts is a crime in all countries. Such practices have been confirmed or suspected to occur within a handful of contexts. Medicine murder (not to be confused with "medical murder" due to medical negligence) means the killing of a human being in order to excise body parts to use as medicine or for magical purposes in witchcraft. Medicine murder is not viewed as a form of human sacrifice