What's the strongest muscle in the body? What does the corpus collosum do—and how to do you pronounce it? Look inside the human body to find out. Get ready for an interactive reading experience like no other, where books come alive in a whole new way. Talk to the book to play games, quiz yourself, learn the latest anatomy facts, and even hear how different heartbeats sound. From bird's-eye views of the different systems to up-close looks at individual organs and cells, you’ll see—and hear—the human body as you’ve never encountered it before.