The circulatory system is an essential body system that provides healthy blood to the body. This book introduces the different parts of the circulatory system, and details what they do to keep this system running. Readers will also learn what they can do to keep their circulatory system healthy. Interesting images and age-appropriate text break down this big concept into an understandable lesson for young readers. Readers will delight in learning about the wonders of the circulatory system!.