Do you know that 60% of the body is composed of water, over 75 miles of nerves throughout the body, you use more than 32 muscles to laugh, you're able to capture 400,000 different sounds and a six-month fetus sucks thumb in the womb? To learn more and begin to discover your body, know what is made, understand how it works, how it communicates with the outside world and also how to defend against infection and how it develops, this is your book.