William Johnston of Lawrence Berkeley National Laboratory provides this classic and effective site. Using the frog as a model organism, The Whole Frog Project explores the potential uses of visualization and 3D imaging to enhance instruction. The page employs technologies such as MRI, X-ray CT scanning, and direct generation from mathematical descriptions to provide a variety of views of frog anatomy. Users can read an introductory lecture on the Project, view a movie of a rotating transparent frog (MPEG or QuickTime), or see polychromatic frog slices.