1 — Brachiocephalic vein; 2 — Superior vena cava; 3 — Inferior thyroid vein; 4 — Oesophageal veins; 5 — Azygos vein; 6 — Hemi-azygos vein; Inferior hemi-azygos vein; 7 — Left gastric vein; 8 — Hepatic portal vein; 9 — Abdominal part; 10 — Thoracic part; 11 — Cervical
part
