Nephroblast see nephridioblast

nephrocytes [Gr. nephros, kidney; kytos, container] Cells that occur singly or in groups in various parts in an invertebrate body and function to transform original waste material into a form with which the metabolic pathways can deal.

nephrodinic a. [Gr. nephros, kidney; odis, labor] Having a single duct serving both excretory and genital purposes.

nephrogonoduct n. [Gr. nephros, kidney; gonos, progeny; L. ductus, leading] Combined genital and excretory ducts.

nephromixium n.; pl. -ia [Gr. nephros, kidney; mixis, mingling] An organ with flame cells and coelomic funnel serving as both excretory and genital duct; a nephrogonoduct. see protonephromixium, metanephromixium, mixo-nephridium.

nephropore n. [Gr. nephros, kidney; poros, pore] (ARTHRO: Crustacea) The elevated opening of the antennal gland on the ventral surface of the coxa of the antenna.

nephrostomal lips (ECHI) The lip-like tissue surrounding the nephrostome; may be inconspicuous, expanded, or leaflike, or extended into long threads that may be spirally coiled.

nephrostome n. [Gr. nephros, kidney; stoma, mouth] The coelomic opening of a nephridium.

nepioconch n. [Gr. nepios, infant; konch, shell] (MOLL: Bival-via) The first part of the dissoconch, when separated by a discontinuity.

nepionic a. [Gr. nepios, infant] Pertaining to very young; postembronic larva; stage of development succeeding the embryonic.

nepionic constriction (MOLL: Cephalopoda] In a nautiloid shell, a definite growth discontinuity of the shell micro-ornamentation thought to correspond to eclosion from the egg.

nepionotype n. [Gr. nepios, infant; typos, type] The type larva of a species.

NEPO virus Referring to NEmatode-transmitted, POlyhedral-shaped viruses. see NETU virus.

neritic zone The region of shallow water over the continental shelf that is subdivided into supratidal (wave splash area), intertidal (littoral), and subtidal regions.

nerve n. [L. nervus, nerve] 1. A single fiber or group of fibers of the peripheral nervous system. 2. (ARTHRO: Insecta) A

tubular wing vein.

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