1 — Subclavian vein; 2 — External jugular vein; 3 — Internal jugular vein; 4 — Superior thyroid vein; 5 — Retromandibular vein; 6 — Occipital vein; 7 — Posterior auricular vein; 8 — Maxillary vein; 9 — Superficial temporal vein; 10 — Superior ophthalmic vein; 11 — Angular vein; 12 — Inferior ophthalmic vein; 13 — Pterygoid plexus; 14 — Facial vein; 15 — Submental vein; 16 — Anterior jugular vein; 17 — Suprascapular
vein; 18 — Left brachiocephalic vein
