Theoretical Systems in Biology: Hierarchical and Functional Integration, Volume II: Tissues and Organs discusses the phenomenology of physiological mechanisms. The book is comprised 10 chapters that are organized into two parts. The first part covers topics about the cell and its environment, such as cell membrane structure, mechanisms of membrane transport, and cell excitability. The second part deals with the mechanisms of physiological functions, which include the metabolic system, the respiratory system, and the renal system. The book will be of great use to researchers and professionals whose work requires a good understanding of human physiology.