Lumbar section spinal column model is mounted on a base. Section includes 5 lumbar vertebrae with discs, sacrum with flap, coccyx, spinal nerves and spinal cord. 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.