The nephridium (plural nephridia) is an invertebrate organ which occurs in pairs and performs a function similar to the vertebrate kidney. Nephridia remove metabolic wastes from an animal`s body. They are present in many different invertebrate lines. There are two basic types, metanephridia and protonephridia, but there are other types. ==Metanep....
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• (n.) A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven`s larva. • (n.) A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven`s larva.
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http://thinkexist.com/dictionary/meaning/nephridium/
unit of the excretory system in many primitive invertebrates and also in the amphioxus; it expels wastes from the body cavity to the (usually ... [3 related articles]
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http://www.britannica.com/eb/a-z/n/26
Ne·phrid'i·um noun ;
plural Nephridia . [ New Latin , from Greek ... of the
kidneys .]
(Zoology & Anat.) A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See
Illust. under
Loeven's larva .
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http://www.encyclo.co.uk/webster/N/15
Type: Term Pronunciation: ne-frid′ē-ŭm, -ă Definitions: 1. One of the paired, segmentally arranged excretory tubules of invertebrates such as the annelids.
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http://www.medilexicon.com/medicaldictionary.php?t=59153
nephridium (singular)
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The excretory organ in
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https://www.encyclo.co.uk/local/21571
the excretory organ of many invertebrates, consisting of a tubule with one end opening into the body cavity and the other opening into a pore at the body surface.
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https://www.infoplease.com/dictionary/nephridium
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