While working on specific application projects (e.g. pelvis lesson), we generated a number of 3D anatomical models using our "modular" approach, where structures are depicted in isolation and together. For example, we visualized pelvic bones and pelvic muscles separately, see Figure 4. and Figure 5., respectively. The two models were merged to form a union of the bones and muscles, see Figure 6.. We can view the models using our virtual camera from an arbitrary viewpoint, Figure 7., Figure 8. and Figure 9. show another view of the same three models.

     Our intension is to partition each structure into identifiable visible substructures and generate for each substructure a separate 3D model. This will result in a collection of "lego" units from which one can build any (complex) structure and take it apart piece by piece and examine the whole structure as well as the pieces. A 3D model can be examined by "flying" along an arbitrary trajectory. For example, we created a union of the bladder, prostate and urethra Figure 10., as well as separate models of the components Figure 11., Figure 12., Figure 13..   Each such model can be explored and viewed separately.

     The best way to illustrate 3D adjacency of anatomical structures is to "peel" the outher structure using animated transparency to reveal the underlying structures and continue peeling layer after layer. In Figure 14. and Figure 15.  We show two snapshots from an animated sequence where the pelvic bone is "peeled" away from the pelvic muscles.