nephridium


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Related to nephridium: Malpighian tubules, prostomium, clitellum

ne·phrid·i·um

, pl.

ne·phrid·i·a

(ne-frid'ē-ŭm, -ă),
One of the paired, segmentally arranged excretory tubules of invertebrates such as the annelids.
[G. nephros, kidney, + Mod. L. -idium, dim. suffix, fr. G. -idion]

nephridium

(nə-frĭd′ē-əm)
n. pl. nephrid·ia (-ē-ə)
1. A tubular excretory organ in many invertebrates, such as mollusks and earthworms.
2. The excretory organ of a vertebrate embryo from which the kidney develops.
ne·phrid′i·al adj.

nephridium

(pl. nephridia) a primitive excretory organ present in many invertebrates (e.g. the earthworm) in the form of a tube which 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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References in periodicals archive ?
A deuterostome-like nephridium in the mitraria larva of Owenia fusiformis (Polychaeta.
Unusual development of the mitraria larva in the polychaete Owenia collaris
On the paired nephridia of Prosobranchs, the homologies of the only remaining nephridium of most Prosobranchs, and the relations of the nephridia to the gonad and genital duct.
Microscopic anatomy of the reproductive system in two sympatric species of Fissurella bruguiere, 1789 (Mollusca: Vetigastropoda)/Anatomia microscopica del sistema reproductor en dos especies simpatricas del genero Fissurella bruguiere, 1789 (Mollusca: Vetigastropoda)
We saw no evidence that mature sperm are concentrated in a particular region of the body prior to spawning (as, for example, in a nephridium), and we did not observe a seminal vesicle in any male specimen.
Spermiogenesis and modified sperm morphology in the "seepworm" Methanoaricia dendrobranchiata (polychaeta: orbiniidae) from a methane seep environment in the Gulf of Mexico: implications for fertilization biology

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