"Your body goes through a cycle of five different stages when you sleep. The fifth stage is known as Rapid Eye Movement (REM) sleep. Learn about the fascinating ways the human body functions in How I Sleep, a My Body title. Each title in the series introduces readers to the ways in which their body senses things, grows, and interacts with the world around them"--Back cover.

Describes the different parts of the brain and how they function.

Explains the parts of our eyes, how they allow us to see in color and darkness, the importance of good vision, and various eye problems.

Describes the parts of the lungs and respiratory system, how they function, and problems that can affect them.

Explains, in brief text and illustrations, the structure and uses of our arms and hands.

Photographs and simple text depict, in increasing numbers, parts of the body that come in pairs, such as hands, thumbs, and knees.

Simple text introduces the functions of the human eye, as well as tools that can help people who have vision problems.