"When Sam breathes in a speck of dust through his nose, The Bod Squad shrinks down in size to see how his respiratory system reacts. The squad learns how the body separates out the dust from the oxygen it needs and how oxygen travels through the body. Anadventure-filled graphic novel that provides information about the human body and how its respiratory system works. Includes contemporary full-color graphic artwork, fun facts, additional information, and a glossary"--
