A decrease in computer size , along with an increase in power , made devices such as the mannequins possible , giving them the ability to simulate bleeding and breathing . The U.S. military uses this technology to train nurses , doctors and medics . They train on life - like mannequins that can simulate combat injuries . The mannequins have skin that bleeds and eyes that glow . High - tech simulators are small enough to fit to soldiers in combat .
The U.S. military uses this technology to train nurses , doctors and medics . They train on life - like mannequins that can simulate combat injuries . The mannequins have skin that bleeds and eyes that glow . High - tech simulators are small enough to fit to soldiers in combat .