In this text, the author encourages the reader to utilise some of the most sophisticated techniques of the computer age and then to apply them to the most complicated of systems, the living organism. The book begins with a review of classical thermodynamic reasoning and shows what it can do and also where it stops short. It then shows how network analysis revolutionised electronics by using a relatively simple methodology combining graph theory and the definition of resistance, capacitance and inductance. The text demonstrates that the most complex of dynamics systems can be solved by this method, even in the areas of biofluid kinetics, pharmacokinetics and other dynamic systems of living organisms. The book is considered essential for students and researchers in biomedical engineering and for advanced graduate students and researchers in physiology.