The human body is an amazing, complex machine that runs on electrical impulses. Find out everything you ever wanted to know about how your body functions with Knowledge How Your Body Works. Perfect for school projects and homework tasks, or just for fun reading, this comprehensive reference features striking, full-color illustrations that grab readers' attention and make learning fun. It also comes complete with a free, fully interactive CDROM that includes exciting Internet links---guiding children to the most interesting and informative sites on the Web! This handy book is the perfect answer for inquisitive minds.