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Sketch of the principal venous trunks. Labels: 1, superior vena cava; , inferior vena cava; 3, right subclavian and innominate veins; 4, left subclavian and innominate veins; 5, 5, right and left internal jugular veins; 8, right azygos vein; 10, left azygos vein; 13, 13, common iliac veins; 14, 14, sacral veins.

Principal Venous Trunks

Sketch of the principal venous trunks. Labels: 1, superior vena cava; , inferior vena cava; 3, right…