You probably know the VOXEL-MAN interactive 3D Atlases of Anatomy and Radiology...
They're interactive. They're 3d. They're the perfect study aid. And now they're free.
VOXEL-MAN is the name of a set of a computer programs for creation and visualization of three-dimensional digital models of the human body derived from cross-sectional images of Computer Tomography, Magnetic Resonance Tomography or photography (e. g. the Visible Human Project), developed at the University Medical Center Hamburg-Eppendorf.
The name Voxel comes from the elementary cuboid component of a digital representation of a three-dimensional object ( a "threedimensional pixel").
While it is easy to construct such atlases by just offering the possibility of browsing through the 2D slices, constructing realistic 3D models is a huge project. But it's been done. Get yours today.