It"s the most important muscle in the body, so it never hurts to learn a bit more about the heart with the Learning Resources Heart Anatomy Model. This 29-piece model is crafted from durable plastic with a realistically colored finish that shows off all the major components of the heart. This particular model features the superior and inferior venae cavae, right and left atria, tricuspid valve, right and left ventricles, pulmonary artery, mitral valve, aortic valve, and aorta. Open it up and learn about the heart from the inside out! Awards American Graphic Design Awards American InHouse Design Awards American Package Design Awards About Learning Resources A leading manufacturer of innovative, hands-on educational materials and learning toys, Learning Resources has been teaching children through play in the classroom and the home for over 25 years. They are a trusted source for educators and parents who want quality, award-winning educational products. Their diverse product line of over 1300 products serves children and their families, kindergarten, primary, and middle school markets focused on the areas of mathematics, science, early childhood, reading, Spanish language learning and teacher resources. Since their founding in 1984, Learning Resources continues to be guided by its mission to develop quality educational products that make learning exciting for children of all ages and abilities. They strive to create hands-on products that build a concrete foundation of skills through exploration, imagination and fun. Dimensions: 5H in. (assembled heart). Builds knowledge of the human heart. Opens up to display the inside of a heart. Recommended for children ages 8 and up. 29-piece plastic model and display stand .