1 — Biceps brachii; Tendon; 2 — Brachialis; 3 — Triceps brachii, lateral head; 4 — Coracobrachialis; 5 — Pectoralis major; 6 — Latissimus dorsi; 7 — Biceps brachii, long head; Tendon; 8 — Biceps brachii, short head; 9 — Deltoid; 10 — Clavicle; 11 — Subscapular fossa; 12 — Levator scapulae; 13 — Rhomboid minor; 14 — Rhomboid major; 15 — Serratus anterior; 16 — Subscapularis; 17 — Teres major; 18 — Triceps brachii, long head; 19 — Triceps brachii, medial head; deep head; 20 — Medial intermuscular septum of arm; 21 — Medial epicondyle
