Describes the components of the circulatory system, how the heart functions to pump blood through the human body, and cardiovascular diseases and disorders.

Inside this guidebook to the muscular system, readers will learn about the different kinds of muscles and how they function. From your eyes to your toes, muscles help you get things done every day. They help you grab, lift, push, pull, swing, and twist. The muscular system is made up of three different kinds of muscles. Many muscles move by thinking about the movement. Others work constantly without us thinking about them, and these muscles help keep...

Describes the various parts of the respiratory system and how they work, and discusses asthma, lung cancer and other lung diseases, and related topics.

Presents an overview of the skeletal system, including key parts of the system and their jobs, how to keep the system healthy, and fun facts. Basic biology fascinates children, and each book in this kid-friendly collection begins with an engaging narrative to examine intriguing scientific questions. The following sections use a straightforward question-and-answer approach alongside colorful photos and illustrations to explain organs and systems of...