"The Blausen Human Atlas is an ideal interactive resource for professional, patient and consumer education. It contains 150 common medical treatments and conditions and combines 3D animation (approximately one to two minutes in length) with accompanying narration."
This article talks about Google Body, a 3-D model of human anatomy that is available free online through Google. It's pretty neat.
Certainly an inexpensive way for students to explore anatomy at their own pace.
"Second life does provide social presence through the avatars we use, lots of opportunities for role play (let's face it, it is at a minimum a role play game), and yes it is immersive, allowing you to experience human from inside the cell walls or visit a detailed simulation of the Cistine Chapel. But the real power of Second Life as a virtual venue for your teaching and learning is the ability to translate real content into something really exciting and powerful. That of course is where the difficulty lies isn't it?"