archinephric duct

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archinephric duct

one of a pair of tubes that carry urine from primitive or embryonic kidneys to the exterior or to a primitive bladder. In amphibians the reproductive system encroaches on the Wolffian duct; in some species the duct carries both urine and sperm, but most amphibians develop a separate tube to carry urine from the kidney.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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