Google shut it down when they shut down Google Labs, but Zygote, the company that developed it for Google, has brought it back as the Zygote Body.
The site is new and you need to use a browser and OS that supports webGL. Most new browsers support this, but Windows XP does not. (for more information on webGL, go here.)
What's really neat about Zygote Body, is that you can hide/shade different body systems to explore in more detail. You can move the image around in 3 dimensions, zoom in and out, and get a really good view of anatomy. You can even search for body parts and turn the labels on and off.
There is also an Android app on the way.
This is a good resource for Biology, Anatomy, A&P and medical classes to use.
