What is your saliva for? Why do we vomit? How long does food take to pass through our bodies? Cartoon doctors take readers on a tour of the human guts and intestines, answering all the important questions about how the process from eating to passing really works. For example, what exactly are we putting in our bodies when we eat? And which areas of the body help us along when we eat? This book contains five hands-on activities, from measuring your guts, to making a model stomach! Questions help children to relate to science, and comical cartoons help them to visualise scientific facts. Lively and informative text is supported by clearly labelled illustrations and detailed photographs.