1 — Lateral mammary branches; 2 — Breast; 3 — Lateral cutaneous branches; 4 — Internal intercostal muscle; 5 — Collateral branch; 6 — First posterior intercostal artery; Second posterior intercostal artery; 7 — Lateral cutaneous branch; 8 — Medial cutaneous branch; 9 — Spinal cord; 10 — Spinal branch; 11 — Dorsal branch; 12 — Scapula; 13 — Thoracic aorta; 14 — Rib; 15 — External intercostal muscle; 16 — Anterior intercostal branch; 17 — Perforating branches; 18 — Sternal branches; 19 — Sternum
