The flaps of this fascinating book reveal the extraordinary machine that is the human body, from the bones to the bacteria in the navel, passing through the blood and the brain. Children will discover what happens when they eat, how their five senses work, what is the role of the heart and lungs, etc. the bones to the bacteria of the navel, passing through the blood and the brain. Children will discover what happens when they eat, how their five senses work, what is the role of the heart and lungs, etc.