Healthcare is essentially all about trouble shooting human-mobile-phones and the most important background information that one needs to have for this  task is essentially the anatomy and physiology of these phone-bodies. So our medical schools begin by imparting this very knowledge in the first years and medical students are privileged to tear apart these phone-bodies made of flesh and learn all about its structure. Image credits to: http://rlv.zcache.ca/anatomy_posterior_iphone_5_cover-r5ae6d21f601d4dd4a9eea441dc0b2cf7_vx34w_8byvr_324.jpg