The right lymphatic duct and the thoracic duct each carry about 50% of the lymph to blood vessels.

Question

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The right lymphatic duct carries lymph from the right arm and the right side of the head and thorax to the right subclavian vein, while the thoracic duct carries lymph from the rest of the body to the left subclavian vein. The thoracic duct carries around 75-80% of the lymph, while the right lymphatic duct carries only about 20-25%. Therefore, neither of them carries about 50% of the lymph alone.

The Right Lymphatic Duct and the Thoracic Duct Each Carry