Sam is a full-size skeleton with fully flexible vertebral column, hand-painted muscle origins and insertions, numbered bones, flexible joint ligaments, and an L3-L4 disc prolapse. Over 600 structures of medical/anatomical interest are identified. Used in hospitals, schools, universities, and laboratories. The skeleton is ideal for active use in teaching and demonstrations. The skeleton is waist mounted on a metal roller stand (painted white). Measures at: 69.5" and 21.98 lb. Features: 3-part skull, individually inserted teeth, removable arms and legs, natural cast, transparent dust cover and 3 year guarantee. Now included with all 3B Scientific Anatomy models is the 3B Smart Anatomy app. This app allows users to register their 3B item to extend the warranty from 3 to 5 years plus free 1 year access to the 3B Smart Anatomy app which includes 23 Anatomy lectures, 117 interactive models and 39 quizzes.