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Metanephridia |
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Metanephridia
excretory organs in invertebrates (mainly annelids), paired metameric tubules of ectodermal origin that open at one end through a ciliated funnel into the coelomic sacs (the secondary body cavity) and at the other end to the exterior. Metanephridia developed evolutionarily from protonephridia. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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