Abstract:
Constructing and installing artificial organs, an extremely research-intensive and
expensive process initially, may entail many years of ongoing maintenance services not needed by a
natural organ. 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.
