1 — Biceps brachii, long head; 2 — Brachialis; 3 — Humerus; 4 — Lateral intermuscular septum of arm; 5 — Radial nerve; 6 — Triceps brachii, lateral head; 7 — Triceps brachii, long head; 8 — Triceps brachii, medial head; deep head; 9 — Medial intermuscular septum of arm; 10 — Ulnar nerve; 11 — Brachial veins; 12 — Median nerve; 13 — Brachial artery; 14 — Musculocutaneous nerve; 15 — Biceps brachii, short head
