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Definition of Thoracic duct

Thoracic duct: A vascular structure which recirculates lymph into the blood stream. It begins in the abdomen and tracks alongside the aorta and esophagus to eventually join with the left brachiocephalic vein.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=5759
Last Editorial Review: 3/26/1998 2:29:00 PM

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