This life-sized, semi-articulating model will help students visualize the knee joint and understand what a torn ligament means. The meniscus, fibular, tibial, anterior and posterior cruciates and patellar ligaments are articulated. The extended femur and patellar ligament is connected to the quadriceps muscle, the primary extensor of the knee joint. This low-cost model is a very good value and much less expensive than similar models. Model size is 29cm x 16cm x 12cm.