Slim Goodbody and his Body Buddies for a system-by-system exploration of the amazing human body. Books in this series include: THE AMAZING CIRCULATORY SYSTEM: How does my heart work? THE ASTOUNDING NERVOUS SYSTEM: How does my brain work? THE DINAMIC DIGESTIVE SYSTEM: How does my stomach? THE EXCITING ENDOCRINE SYSTEM: How do my glands work? THE MIGHTY MUSCULAR AND SKELETAL SYSTEM: How do my bones and muscles work? THE REMARKABLE RESPIRATORY SYSTEM: How do my lungs work?