An introduction to the digestive system. This book introduces readers (Grades 3-5) to the digestive system, including the digestive process, the organs involved

For use in schools and libraries only. Introduces the digestive system, including the digestive process, the organs involved in digestion, and common problems a

Did you know that your nerve impulses are 1,000 times SLOWER than your computer? Or that it's normal to fart - as often as 20 times a day? Get the buzz on healt

Simple text and photographs introduce the respiratory system and its purpose, parts, and functions.