A simple introduction to the composition and functions of blood.

An explanation, illustrated by drawings, of how a baby grows within the mother from a single cell into a fully formed human being.

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.

Briefly discusses the principles of genetics and heredity as illustrated by a youngster's family tree.

Describes the process of hearing, during which sound waves travel through the ear and become signals the brain interprets as individual sounds.

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

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