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.
References in periodicals archive ?
A deuterostome-like nephridium in the mitraria larva of Owenia fusiformis (Polychaeta.
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.