Denoyer Geppert the original heart of America model features twice the size of a human adult heart to show detail and facilitate study. Three hinged portals allow full access to heart chambers and valves. Attached portions of trachea and esophagus demonstrate their relationship to major vessels. Unbreakable model fully rotates on wooden pedestal or lifts off for pass-around viewing. 100 percent American made - authentic hand-painted detail is proudly signed and dated by its crafter. Boasting no less than 63 cardiac structures, all number-coded and identified in a corresponding key, this lifelike model is renowned for its anatomical detail. Overall dimensions on base measures 7-inches length by 7-inches width by 15-inches height.