This 4-part anatomical human ear model represents outer, middle and inner ear. The detailed human ear model has removable eardrum with hammer, anvil and stirrup as well as 2-part labyrinth with cochlea and auditory/balance nerve. The ear is on base for easy display in a classroom or doctor's office. This ear model is a great way to teach and study the anatomy of the human ear. 3 times life-size. 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.