nephridium

(noun)

a tubular excretory organ in some invertebrates

Related Terms

Examples of nephridium in the following topics:

  • Flame Cells of Planaria and Nephridia of Worms

    • A nephridium is more evolved than a flame cell in that it has a system for reabsorption of some useful waste products, such as metabolites and ions, by a capillary network before excretion (unlike planaria that can only reabsorb useful metabolites after excretion).

  • Classification of Phylum Mollusca

    • The mantle cavity encloses the ctenidia (singluar: ctenidium) as well as a pair of nephridia (singular: nephridium).