This highly acclaimed text is now more up to date than ever! The Updated 5th Edition features new information and free access to a full-text online edition, images, animations, and much more at the brand-new STUDENT CONSULT website. Readers will continue to enjoy the current, concise, and straightforward approach to the field that made previous editions so popular. They'll understand the experimental observations that underlie the science of immunology at the molecular, cellular, and whole organism level-and explore the conclusions that can be drawn from those observations. The smart way to study! Elsevier titles with STUDENT CONSULT will help you master difficult concepts and study more efficiently in print and online! Perform rapid searches. Integrate bonus content from other disciplines. Download text to your handheld device. And a lot more. Each STUDENT CONSULT title comes with full text online, a unique image library, case studies, USMLE style questions, and online note-taking to enhance your learning experience.