Google continues to invent new tools that no one has a use for. The latest, The Google Body Browser, might find some use with animators or artists to a limited degree. But it does let you flip through the guts of an average woman, which might be helpful for those serial killers out there.
It does take the latest Chrome beta to work, so consider that a requirement. All jabs aside, this is a nicely put together anatomy reference with all the layers set on different transparency sliders and switches. If you do have the need to display or show part of the anatomy that random picture searches aren't doing it for you, this could be your solution.