Nephridium - Wikipedia
网页The nephridium (pl.: nephridia) is an invertebrate organ, found in pairs and performing a function similar to the vertebrate kidneys (which originated from the chordate nephridia). Nephridia remove metabolic wastes from an animal's body. Nephridia come in two basic categories: metanephridia and protonephridia.
Structure and development of nephridia in Annelida and related …
网页Abstract. Two different kinds of filtration nephridia, protonephridia and metanephridia, are described in Polychaeta. During ontogenesis protonephridia generally precede metanephridia. While the latter are segmentally arranged, protonephridia are characteristic for the larva and are the first nephridial structure formed during ontogenesis.
Structure and development of nephridia in Annelida and related …
网页2006年3月29日 · PDF | Two different kinds of filtration nephridia, protonephridia and metanephridia, are described in Polychaeta. During ontogenesis protonephridia... | Find, read and cite all the research you...
网页Key words: evolution, Annelida, nephridia, ultrastructure. Abstract. In Annelida, nearly each segment contains a pair of ducts that either are protonephridia or metanephridia. These segmental organs function as excretory organs and, after having been modified, they may also act as gonoducts during maturity.
Nephridial and gonoduct distribution patterns in Nerillidae (Annelida …
网页2004年7月8日 · The distribution and configuration of nephridia and gonoducts are described for seven species from seven genera of the interstitial polychaete family Nerillidae. The ciliated nephridia and gonoducts were identified by tubulin staining and examined with a confocal laser scanning microscope.
11 Coeloms and nephridia in annelids and arthropods - De Gruyter
网页Koch M, Quast B, Bartolomaeus T. 11 Coeloms and nephridia in annelids and arthropods. In: Wägele J, Bartolomaeus T (ed.) Deep Metazoan Phylogeny: The Backbone of the Tree of Life: New insights from analyses of molecules, morphology, and theory of data analysis. Berlin, Boston: De Gruyter; 2014. p.173-284. https://doi.org/10.1515/9783110277524.173
Structure and development of nephridia in Annelida and related …
网页2005年3月1日 · New information is provided on the ultrastructure of cells that secrete the organic material used to form the tubes inhabited by tube-dwelling annelids and the possibility that PGOs and nephridia have a common origin is discussed.
Three consecutive generations of nephridia occur during …
网页2010年6月14日 · Annelid nephridia have been very well investigated on a morphological level (Bartolomaeus and Quast, 2005). They develop as segmental organs and typically span segment boundaries with the ciliated funnel opening in the anterior segment, and the canal as well as nephridiopore, located in the posterior one.
Coeloms and nephridia in annelids and arthropods
网页2014年4月1日 · Our data on coelomogenesis in yolk-rich embryos of onychophorans cause further ambiguity on ancestral states of mesoderm development in Panarthropoda.Current insights reveal that the body of...
Animal evolution: Of flame and collar cells - Cell Press
网页2021年8月23日 · Nephridia are small excretory organs that function in waste disposal and osmoregulation in a wide range of animals but differ in type and germ-layer origin. A new comparison of gene expression in disparate species supports homology of nephridia across bilaterian animals, and their origin from ciliated epidermal cells.
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