"Breathing is essential for life. It brings oxygen (a gas in the air) into our lungs. We need oxygen to keep our brains and bodies working properly. Without it--without breathing--we would die very quickly! This ... guide to breathing explores the process of breathing and how disgusting substances like mucus and snot have unexpected uses."--Publisher.
"Spit uncovers the secrets secreting in the many mouths on the globe. From humans to cows to vampire bats to spitting spiders, this book looks at spit from many different angles"--Provided by publisher.
The human body is pretty gross when it gets sick. The nose gets stuffed up, and some people go through boxes of tissues trying to get it clear. But what is all that stuff in the ears, nose, and throat anyway? It s phlegm! This sometimes gross and always fascinating book explores why our bodies make spit and phlegm through colorful photographs and insightful explanations of bodily functions. Readers will discover the science behind the gross studying why we need saliva to eat and phlegm to protect ourselves from bacteria and illness.
Explores some repulsive aspects of the human body with a focus on the mouth, and provides facts and information on saliva, cavities, bacteria, cold sores, tonsils, and other related topics.
