This book continues a tradition of engaging readers with real-world applications, high-interest case studies, and inquiry-based pedagogy to foster a lifetime of discovery and scientific understanding. Maintaining the friendly writing style that has made this book a best-seller, the tenth edition continues to incorporate true and relevant stories using a chapter-opening Case Study that is revisisted throughout the chapter and concluded at the end of the chapter. New to the tenth edition are Learning Goals and Check Your Learning questions that help readers assess their understanding of the core concepts in biology. To increase the book's focus on health science, additional Health Watch essays are provided throughout the units, and more anatomy & physiology content has been incorporated into the main narrative. Other highlights include new and revised Consider This questions, Have You Ever Wondered? questions, and expanded MasteringBiology assignment options.