Welcome to your course in anatomy and physiology! Many of you are taking this course because you hope to pursue a career in one of the allied health fields or nursing. Or perhaps you are simply interested in learning more about your own body. Whatever your motivation, Principles of Anatomy and Physiology, 15th edition and WileyPLUS have all the content and tools that you need to successfully navigate what can be a very challenging course. Over the past fourteen editions of this text we have made every eff ort to provide you with an accurate, clearly written, and expertly illustrated presentation of the structure and function of the human body and to explore the practical and relevant applications of your knowledge to everyday life and career development. This fift eenth edition remains true to these goals. It distinguishes itself from prior editions with updated and new illustrations and enhanced digital online learning resources. Engaging Digitally The content in Principles of Anatomy and Physiology is completely integrated into WileyPLUS. This allows you to create a personalized study plan, assess your progress along the way, and access the content and resources you need to master the material. WileyPLUS provides immediate insight into your strengths and problem areas with visual reports that highlight what’s most important for you to act on. Many dynamic programs integrated into the course help build your knowledge and understanding, and keep you motivated. Fifteen 3-D Physiology animations were developed around the most diff icult physiological concepts to help students like you understand them more eff ectively. Muscles in Motion are animations of the seven major joints of the body, helping you learn origin, insertion, and movements of muscles surrounding those joints. Real Anatomy is 3-D imaging soft ware that allows you to dissect through multiple layers of a real human body to study and learn the anatomical structures of all body systems.