"Some low-frequency sounds--such as noise from storms or truck engines--can make you feel dizzy and nauseated. An index finger's light touch can stop people from losing balance. You are more prone to trip when you think someone is watching you. A breakthrough in improving balance as we age might just come through the study of the Achilles tendon. A person gets "falling down drunk" due to a tiny structure in the inner ear that floats when it becomes...

"Humorous text and characters help teach kids about human senses" --

Presents an overview of the skeletal system, including its functions and structure, as well as information about how bones work and how to keep bones healthy. Includes a glossary, a list of additional resources, and critical thinking using the Common Core questions.

Presents an overview of the muscular system, including its functions and structure, as well as information about muscular system problems and advice about how to keep muscles healthy. Includes a glossary, a list of additional resources, and critical thinking using the Common Core questions.

Presents an overview of the circulatory system, including its functions and structure, as well as information about circulatory problems and advice about how to keep one's heart healthy. Includes a glossary, a list of additional resources, and critical thinking using the Common Core questions.

"Raina wakes up one night with a terrible upset stomach. Her mom has one, too, so it's probably just a bug. Raina eventually returns to school, where she's dealing with the usual highs and lows: friends, not-friends, and classmates who think the school year is just one long gross-out session. It soon becomes clear that Raina's tummy trouble isn't going away... and it coincides with her worries about food, school, and changing friendships. What's going...