The _______ forms the major part of the _______ joint. Its thick, proximal end carries the _________ and _______ processes that are separated by a deep concavity called _________, which is perfectly shaped to articulate with the ______ of the humerus. On the_______ side of the coronoid process is the ______ notch for articulation with the ______ of the _______. The distal end of the ulna is smaller and ends in a lateral _______ and a medial ___________.