Developed by researchers at the University of Utah, the AnatomyLab app is a virtual dissection of a human body. It includes images of real human cadavers and is aimed at medical and anatomy students. You're able to move between 40 separate body layers, zoom into different structures and rotate them to get different views. The one complaint I have is that it would be nice to keep the face of the cadaver covered, as they do in most classes. There is also a cheaper, scaled down version called "My Body," which is a bit more appropriate for the curious amateur. It's $1.99.