About the Book: Inside Out Human Body is an engaging, illustrated guide that explores the human body layer by layer, showcasing its complexity as the universe’s most amazing machine. The book features a layered 3-D model to visually explain key systems—including the muscular, skeletal, nervous, digestive, and circulatory systems. With colorful diagrams, informative text, and fun, interactive lessons (like taking your pulse), it provides an entertaining introduction to how your body works