Biol 273 chapter 1: introduction to physiology notes. Physiology: the study of the normal functioning of a living organism and its component parts, including all its chemical and physical processes. Emergent properties: properties that cannot be predicted to exist based only on knowledge o the systems individual component of the system. Result from complex, nonlinear interactions of the different components. Cell: the smallest unit of structure capable of carrying out all life processes. Tissues: form structural and functional units known as organs. Organs: a group of tissues that carries out related functions. Organ system: group of organs that work together to perform a certain task. Integumentary system: composed of the skin, forms a protective boundary. What is an integumentary system? that separates the body"s internal environment from the external environment. Musculoskeletal system: provides support and body movement. Digestive (gastrointestinal) system: takes up nutrients and water and eliminates wastes. Urinary (renal) system: removes excess water and waste material.