We all have one. The human body. But do we really know all of its parts and how they work? The Handy Anatomy Answer Book is the key to unlocking this door to a wondrous world. Covering all the major body systems--integumentary (skin, hair, etc.), skeletal, muscular, nervous, sensory, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and reproductive, and, for good measure, adds chapters on growth and development and how science can help and augment the body--it follows the fascinating maze of organ systems and shows how much the body does routinely just to let you move, breathe, eat, and fight off disease. This handy reference helps make the language of anatomy--as well as physiology and pathology--more understandable and less intimidating. Fascinating trivia, plus serious facts, combine to answer over 1,200 questions about the human body, including What is Gray's Anatomy? What does it mean to have 20/20 vision? Why is blood sticky? How does exercise affect the heart? What is "gluten intolerance"? Is urine always yellow in color? What are the seven warning signs of Alzheimer's disease? What is a reflex? How much sleep does an individual need? Can humans use organs from other animals for transplants?