Functional larynx model is 2.5x size. The epiglottis, vocal cords and arytenoid cartilage are movable in the functional larynx. Additionally the following structures of the human larynx are represented: Hyoid bone, Cricoid cartilage, Thyroid cartilage, Thyroid, Parathyroid glands. This anatomically correct human larynx is a great addition to any doctors office or classroom. The functional larynx model is on a stand. 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.