Visible Body built an interactive 3D model of the human anatomy now available for the iPad. They also have an interesting collection of celular and other animations / illustrations on their page:
Amazingly, there are already more “apps for that” than I could possibly mention here. If you were looking for a definite all-encompassing review on the topic, well, keep looking and keep us posted! Nevertheless I gathered here are a few starting points for checking out and making up your mind.
Elsevier: Gray’s Anatomy
Netters interactive 3D Atlas of Human Anatomy
3D Medical Animation: Blausen Human atlas HD