Briefly explores a number of still-unsolved questions about the human body--including why people laugh, dream, and yawn. Includes photographs, illustrations, a glossary, and further resources.
Scientist Dr. Ick introduces readers to some of the grossest things in the human body like the intestines, mucus, pus, germs, urine, and feces. Includes an experiment and a glossary.
Presents a number of questions kids may ask about the human body and its abilities--such as if it is possible to lick one's own elbow--and provides answers based on statistics and science.
"Describes the fascinating details of the human body that are too small for the unaided eye to see, and how these microscopic systems work to keep the body alive and healthy"--Provided by publisher.