"Besides being gross, what is the point of boogers and mucus? Read all about how these slimy substances help us digest our food and prevent us from becoming sick. You'll also find out just what this sticky stuff is made of, why we produce more of it when we've got a cold, and what animals like slugs and snail do with their mucus!,"--back cover.

Includes index.

What is mucus? -- How does mucus protect us? -- What are boogers and snot? -- Where else do produce mucus? -- Does mucus help us digest food? -- Too much of a good thing? -- How can we get rid of mucus? -- Why do slugs and snails produce mucus? -- What animals use mucus for defense? -- What animals use mucus for shelter? -- How else do animals use their mucus? -- Is mucus useful to us?.