The science of acne and warts

"Your skin is your body's coat. It covers everything inside you. Muscles, bones, blood, organs-your skin keeps it all in place. It also keeps bad stuff out, like germs. This ... guide to skin, the largest organ in the human body, explores everything from how it protects us to how it can itch and irritate us, and delves into why skin is such an integral part of our identity."--Publisher.