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Nephridium


nephridium
tubular excretory organ of lower animals such as earthworms
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
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nephridium pl. nephridia
[Gk. nephros, kidney]
A tubular excretory structure found in many invertebrates.
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nephridium The excretory organ in þatworms and other invertebrates; a blind-ended tubule that expels waste through an excretory pore.
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nephridium One of the segmentally arranged, paired excretory tubules of many invertebrates, notably the annelids.
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nephridium
(pl. nephridia) A primitive excretory organ present in many invertebrates, for example, the earthworm, in the form of a tube that opens at one end to the exterior. The other end may open into the coelom or may terminate in a flame cell.
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Nervous System (with brain).
Excretory System (nephridium or nephridia).
Circulatory System (open circulatory system).
Respiratory System (gills or lungs).
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