Brought to Life has images of 4,000 medical objects selected from the Science Museum's collections. From amulets to alligators, leech jars to lodestones you can find all of these from here. The Museum's objects, many of which are from the Wellcome Trust, cover more than 3,000 years of medical history.
Use the drop down menus on the left, and press the 'Find' button. You can also use the 'Objects search', lower down the page on the left by typing in a word or words and pressing 'Object search'.