Images for Health:
Medical Images: http://unmc.libguides.com/images
Images from US National Library of Medicine: http://wwwihm.nlm.nih.gov/cgi-bin/gw_44_3/chameleon?skin=nlm&lng=en
Graphic Images of Health Conditions and Symptoms: http://www.lib.uiowa.edu/hardin/md/gallery2.html