Explains the processes by which a hamburger and other foods are used to make energy, strong bones, and solid muscles as they pass through the digestive system.

A simple explanation of the structure of the heart and how it works.

Explains how people create too much waste and how waste is now recycled and put into landfills.

Describes the physical development of an infant as he learns to use his hands, mouth, feet, and otherwise adjust to life in his new environment.

Explains the mechanics of speech: what body parts are used, and how different sounds are formed.

What is a dentist? -- Why do you go to the dentist? -- Where do you see the dentist? -- What happens at the dentist's office? -- Who helps the dentist? -- What does the dentist do? -- What tools does the dentist use? -- What happens next?. Introduces teeth, describing how many we have at various stages of life, why they fall out and what they do. Photographs and simple text introduce the work done by a dentist. A girl describes how she brushes...