Bionics means the replacement or enhancement of organs or other body parts by mechanical versions. Bionic devices, such as bionic arms, legs and hands, are made to help people with disabilities lead a normal life. Artificial limbs are used to replace a missing body part that may have been lost due to injuries, disease or birth defects. Bionics is the science of creating artifical systems that have some of the characteristics of living organisms. Bionics can be exceptionally advanced peices of technology, however, there is still a lot of room for improvement before they reach the full range of motion and sensitivity of real body parts. Bionics now encompasses almost all parts of the human body, incuding internal parts of the human body. The world of bionics and the technologies involved are always still advancing to this day.