This book is about the ontology of anatomy. With respect to the individual ?elds of ontology and anatomy, the ontology of anatomy has aspects of both an old and a new topic area. A new aspect for anatomy is that the ontology of anatomy brings medicine together with molecular biology and its related subjects. Similarly, for the ?eld of ontology, biomedical informatics has seen an explosion in the use of onto- gies and ontology-like resources. There has been a particular interest in ontologies for human anatomy and also the anatomy of other types of organism. This explosion has pushed the ?eld...