1 — Sternum; 2 — Sternal branches; 3 — Lateral pectoral cutaneous branch; 4 — Anterior branch; 5 — Internal intercostal muscle; 6 — Posterior branch; 7 — Oesophagus; 8 — External intercostal muscle; 9 — Azygos vein; 10 — Latissimus dorsi; 11 — Dorsal lateral cutaneous branch; 12 — Intercostal artery, posterior branch; 13 — Spinal cord; 14 — Dorsal medial cutaneous branches; 15 — Muscles of back breves; 16 — Posterior intercostal artery; 17 — Iliocostalis; 18 — Posterior intercostal artery, dorsal branch; 19 — Aorta; 20 — Thoracic duct; 21 — External oblique; 22 — Internal thoracic artery; 23 — Internal thoracic artery, anterior intercostal branches; 24 — Perforating branch; 25 — Internal thoracic artery, anterior cutaneous branch
