But how would it tell an artilicial hand to do that? Dr. William Craelius, who has invented an artificial hand says. -Comnmunication is kcy. and it is easle1 Machines are not the only things that can replace a part of the body. A transplant i an operation to move a body part. such as a heart or kidney. from one person to another. One major problem with transplants is a lack of available hearts, kidneys, and so on, so hospitals not keep up with the demand. Patients have to wait. and some patients have no time left. scientists see bionics as the best hope for the future. Using bionics, a patient