Includes index.

Author Claire Eamer's clear, well-organized and accessible writing --- augmented throughout with fun facts and silly microbe jokes in sidebars --- keeps the book interesting and enjoyable. Marie-Eve Tremblay's bright and cheerfully funny illustrations bring the details to delightful life. With its cutting-edge information about a topic children will find fascinating, this book makes an excellent complement to a life science lesson on the human body. It would also work well for a class on healthy living. A table of contents, glossary and index are included.