The Whole Body Catalogue
Growing array of artificial body parts are available to correct medical problems body cannot fix; scientists and engineers have devised parts to enhance vision and hearing, strengthen weakened bones, bolster or replace faltering organs, replace damaged joints, substitute for disabled nerves or improve appearance; use of artificial parts has become commonplace, and many more are in various stages of development around world; use of transplanted organs and tissues has been hampered by chronic shortages of donor organs, problems of compatibility and rejection, concerns about transmitting infections and other problems; detailed list of some of implants available or in trials for different areas of body; drawing (L)