6The Immune System is a concise yet thorough human-oriented introduction to how the human immune system works. It provides an up-to-date presentation of the field, written in an accessible style, replete with relevant medical examples. Plentiful illustrations and micrographs complement and illuminate the explanations. The Fifth Edition is supported by InQuizitive, Norton's award-winning, easy-to-use adaptive learning tool that provides student practice and promotes critical thinking.