Take a look at this human anatomy video tutorial to see how to dissect the upper limb joints on a human cadaver. You'll go through dissecting the shoulder joint, containing the glenohumeral joint and the acromioclavicular joint.
So, get out your human corpse and your scalpel and get cutting away to learn the science of these joints. Educate yourself, take an anatomy class, or just watch this video.
You'll also check out the capitulum, which is a small eminence on a bone, as on the distal end of the humerus, by which it articulates with another bone.
This is very informative for medical students in need of cadaver dissection instructional videos.