The triceps brachialis is the large muscle at the back of the upper arm. It originates along the base of the shoulder blade and the humerus and inserts into the tip of the ulna at the elbow.
Mountain Lion skeleton 13
The triceps brachialis is the large muscle at the back of the upper arm. It originates along the base of the shoulder blade and the humerus and inserts into the tip of the ulna at the elbow.