Supernumerary body part considered to have lost much or all of their original function through evolution. These body parts can be classed as additional to the required functioning of the body. In human anatomy the vermiform appendix is sometimes classed as a vestigial remnant. Prosthesis is an artificial extension that replaces a body part, and cybernetics is the study of computer technology in relation to organisms which can include replacement or additional body parts. Body integrity identity disorder (BIID) is a psychiatric disorder in which a person thinks that they have one or more additional limbs than they should, despite having two arms
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