Zygote Body™, the new incarnation of Google Body, is gorgeous, three-dimensional human anatomy at your fingertips. Just choose gender and go! By manipulating the controls, you can reveal layers, rotate the image vertically and horizontally, change systems, select for labels...it is phenomenal! And FREE!
Here's a screenshot that shows the controls on the left:
Go over to their site and look around to see everything. What an incredible resource from a classy company, all FREE for you!