Full-color photography and anatomical models and microscopic views, along with clear diagrams and historical artworks, offer a unique 'eyewitness' view of the discoveries that have changed our understanding of the human body. Favorite Eyewitness titles are now available in Spanish-language editions for American readers. With the help of special language consultants, each book has been expertly translated with U.S. Spanish speakers in mind, offering native speakers and language students alike the opportunity to experience the truly unique resource that is Eyewitness.