"The nervous system is the messenger system of the human body. Without it, you couldn't move your muscles, type on a computer, or think! This title offers a comprehensive breakdown of the nervous system, highlighting key aspects connected to it, such as nerves, signals, and reflexes. Through easy-to-understand language, fun fact boxes, intriguing sidebars, and colorful photographs and diagrams, readers are able to fully comprehend this vast and complex system. They also are able to identify why it is one of the most important parts of the human body with the help of carefully chosen discussion questions"-- Provided by publisher.