How does oxygen reach our cells? What does our body do with the carbon dioxide it produces? Each breath we take demonstrates the marvel of the human lungs and respiratory system. This accessible book gives inquisitive readers an inside look at this essential bodily function. Engaging graphics and concise language create a reader-friendly experience that will attract even those who are reluctant to study science materials. Fun, easy-to-follow flowcharts summarize key concepts at the end of each chapter, ensuring that readers are able to visualize and retain essential information. This unique, visually rich approach to learning will make this book stand out in any library.