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Some nutrients from the small intestine get absorded into the lymph and then led into the systemic circulation.

In which blood vessels are these nutrients first found?

The answer should be in the superior vena cava. but why

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According to Wikipedia the answer is the subclavian veins: "The thoracic duct drains into the left subclavian vein, near its junction with the left internal jugular vein. It carries lymph (water and solutes) from the lymphatic system, as well as chylomicrons or chyle, formed in the intestines from dietary fat and lipids. The right lymphatic duct drains its lymph into the junction of the right internal jugular vein, and the right subclavian vein." –  Alan Boyd May 15 '13 at 6:37
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