Book excerpt: InterActive Physiology® significantly enriches the teaching environment by providing audio/visual understanding of complex topics. For use as both a presentation and teaching tool in the classroom, as well as a study tool for students, these CD-ROMs feature full-color animations, sound, video, and extensive interactive quizzes and games that thoroughly demonstrate difficult physiology concepts, many of which occur at the cellular and molecular level. The InterActive Physiology® 8-System Suite is available in the following purchasing options: Packaged for free with Marieb's Human Anatomy and Physiology, Sixth Edition; Marieb's Anatomy & Physiology; Martini's Fundamentals of Anatomy & Physiology, Sixth Edition; Silverthorn's Human Physiology, Third Edition; and Germann's Principles of Human Physiology . Packaged for a special low price with other Benjamin Cummings titles, stand-alone CD-ROMs, or online subscription versions. Institutional multi-user license edition. Please visit www.interactivephysiology.com for more details.