1 — Brachioradialis; 2 — Bicipital aponeurosis; 3 — The integument; 4 — Median nerve; 5 — Biceps brachii; 6 — Coracobrachialis; 7 — Profunda brachii artery; Deep artery of arm; 8 — Deltoid; 9 — Deltoid branches; 10 — Deltoid branch; 11 — Acromial branch; 12 = 10 +11 — Thoraco-acromial artery; 13 — Clavicle; 14 — Subclavius; 15 — Axillary artery, subscapular branches; 16 — Subscapularis; 17 — Pectoralis major; 18 — Thoracodorsal artery; 19 — Ulnar nerve; 20 — Teres major; 21 — Latissimus dorsi; 22 — Triceps brachii, long head; 23 — Brachial artery; 24 — Superior ulnar collateral artery; 25 — Inferior ulnar collateral artery; 26 — Medial intermuscular septum of arm; 27 — Humerus, medial
epicondyle; 28 — Pronator teres