Hardbound. The extraordinary development of all branches of biology together with the recent breakthroughs in computer science undoubtedly explain the renewed interest in the theoretical aspects of biology. In each book in this three volume set, the author has concentrated on the mathematical methodology likely to lead to a general formalization of current physiological knowledge. It is hoped that this approach should, within the conceptual framework presented, reveal the relationships that exist between neighbouring domains of the natural world. Indeed one of the essential objectives of Theoretical Systems in Biology is precisely the search for possible relationships between the various biological disciplines. This three volume set is a translation, with extensive revisions and updates, of the French edition entitled Traite de physiologie theorique. The work has an interdisciplinary approach, covering all aspects of classi