This knee joint model can be used to demonstrate various disorders of the human knee joint (articulatio genus) and their respective therapies in a graphic way. The knee joint shows a natural-sized, healthy right knee joint in upright position, including parts of the femur, tibia and fibula as well as the ligament system and the patella with part of the femoral tendon. The patella and attached tendon and the front half of the knee joint (which is frontally sectioned) can be detached to reveal the internal structures. Sectional knee joint mounted on base. 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.