Which vessels drain lymph into the venous blood circulation?

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Lymph returns to the bloodstream at the points where the lymphatic ducts drain into the venous system, specifically at the venous angles near the junctions of the subclavian and internal jugular veins. The thoracic duct carries most of the body’s lymph and empties into the left subclavian vein, while the right lymphatic duct drains the right side of the head, neck, and thorax into the right subclavian vein. Because these ducts terminate at the subclavian veins, these vessels are the entry points for lymph into venous circulation. The aorta and pulmonary artery carry arterial blood, not lymph, and while the superior vena cava collects venous blood from the upper body, the direct lymph drainage goes into the subclavian veins.