Books with author Michael Mullan Sandy Donovan

Your mouth really is filthy! It’s a saliva bath for millions of tiny little creatures that share your food, chew holes in your teeth, and make your breath smell like a garbage truck. From cavities to canker sores, those little creatures can also create some repulsive problems. Learn all about saliva, plaque, and the bacteria that infest your mouth - and find out how to keep that mouth of yours healthy. With close-up pictures and lots of disgusting facts, this book tells all about the gross science behind your body’s functions.

What’s that funny feeling coming from your gut? It could be oozing stomach acid or a booming belch or stinky fart that is ready to burst. These revolting reactions happen during the digestion of food. Once you’ve mashed up and swallowed a meal, your body has to turn it into energy, water, and . . . well . . . poop. Find out about all the nasty things that happen deep inside your belly - and learn why they sound, smell, and feel the way they do. With close-up pictures and lots of disgusting facts, this book tells all about the gross science behind your body’s functions.