Introduces the circulatory system, its purpose, parts, and functions.

"Simple text, photographs, and diagrams introduce the muscular system and its purpose, parts, and functions."--Title page verso.

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

Introduces the human brain, its parts, how it works, and what it helps us accomplish. Includes an activity to determine which side of the brain is more used by the reader.

Examines the role and function of the human lymphatic system.