nephridial papilla

nephridial papilla
(ANNELIDA)
The projection marking the opening of the excretory organ. nephridioblast n. [Gr. nephros, kidney; blastos, bud]
An ectodermal cell that is precursor to a nephridium.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • reproductive system, animal — Introduction       any of the organ systems by which animals reproduce.       The role of reproduction is to provide for the continued existence of a species; it is the process by which living organisms duplicate themselves. Animals compete with… …   Universalium

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