The more people learn about their hardworking heart, breathtaking lungs, and brilliant brain, the more they marvel at the amazing machine that's called the human body. This beautiful book, teeming with astonishing information and eye-catching activities, takes young biologists on a journey into the human body. Each thought-provoking project is presented with easy-to-follow instructions, while accompanying facts and imaginative graphics allow readers to truly engage with the important subject material.