1 — Medial epicondyle; 2 — Trochlea; 3 — Medial supraepicondylar ridge; Medial supracondylar ridge; 4 — Medial border; 5 — Shaft of humerus; Body of humerus, anteromedial surface; 6 — Anatomical neck; 7 — Crest of lesser tubercle; Medial lip; 8 — Lesser tubercle; 9 — Head of humerus; 10 — Coronoid fossa; 11 — Greater tubercle; 12 — Intertubercular sulcus; Bicipital groove; 13 — Surgical neck; 14 — Radial groove; Groove for radial nerve; 15 — Shaft of humerus; Body of humerus, anterolateral surface; 16 — Lateral border; 17 — Lateral supraepicondylar ridge; Lateral supracondylar ridge; 18 — Radial fossa; 19 — Capitulum; 20 — Lateral epicondyle
