Figure 3. The prostatic urethra and its concept space.
Figure 4. Concept space for physical anatomical structure (Anatomical entity is abstract so no image is displayed).
Figure 5. System for specifying regions using features (Anatomical entity is abstract so no image is displayed).
Figure 6. This ontology fragment shows that bones are in an is-a
relation to anatomical structure and that bones of specific anatomical.
regions, such as the bones of the pelvis, are in an is-a relation
to the general category of bones.
