Humerus (Anterior view)	Left ----- Right	The proximal ends of the bones are oriented toward the bottom of the screen. The proximal end of each bone articulates with the scapula. The pectoral and deltoid ridges are important points of muscle attachment. The pectoral ridge extends from the greater tubercle along the medial edge of the bone and the deltoid ridge extends from the greater tubercle along the lateral edge of the bone. The supracondylar foramen is an opening in the distal end of the bone through which both blood vessels and nerves pass. Return to shoulder joint Return to pectoral muscles
Humerus (Posterior view)	Left --------- Right	In the posterior view, the head of the humerus is clearly seen. The smooth, rounded head articulates with the glenoid fossa of the scapula. The indentation (red arrow) on the distal end of the humerus allows for the lever-like motion of the forelimb. When the limb is extended the olecranon of the ulna moves into this groove. Return to forelimb Return to tutorial