Science of snot & phlegm - the slimy truth about breathing

This gruesome guide to breathing uses fact-packed, easy-to-read text and humorous illustrations to explore the process of breathing and how disgusting substances like mucus and snot have unexpected uses. Each spread has multiple entry points, including an introductory paragraph, illustrations and side panels such as Fascinating Facts, Helpful Hint, Can You Believe It?, and Disgusting Data, which provide additional information and handy advice.