Functional Shoulder Joint This high quality functional shoulder joint model provides a graphic demonstration of the anatomy and mechanics of the shoulder joint, allowing better doctor-patient or teacher-student understanding of the anatomy of joints. Use this life-size and fully flexible shoulder joint model to demonstrate abduction, anteversion, retroversion, internal/external rotation and much more. Shoulder joint model consists of shoulder blade, collar bone, portion of humerus and joint ligaments. The Functional shoulder joint model is on a stand for easy study of the anatomy of the human shoulder.