An introduction to the physics of living organisms and biological systems Biophysics is a research field which applies physics principles, tools, and methodologies to the study of biological systems and organisms. Also conceived as living state physics, it entails a multidisciplinary approach to the study of biological life, combining physics, biochemistry, cell and molecular biology, medicine, engineering, and more. The physics of macromolecules and macromolecular assemblies are a particularly important aspect of this broader field. Biophysics offers a comprehensive introduction to the general principles of the living state and its important biological applications. Beginning with a definition of fundamental theories, including the idea of the living state, the book provides an overview of basic thermodynamics, kinetics, information theory, electrostatics in solutions, fluid mechanics and macromolecular physics, and their relationship to the living state. After a presentation of physi