metanephros


metanephros
The most caudally located of the three excretory organs appearing in the evolution of the vertebrates (the others being the pronephros and the mesonephros); in mammalian embryos, the m. develops caudal to the mesonephros during its regression, becoming the permanent kidney. SYN: hind kidney. [meta- + G. nephros, kidney]

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meta·neph·ros -'nef-rəs, -.räs n, pl -neph·roi -.rȯi either member of the final and most caudal pair of the three successive pairs of vertebrate renal organs that functions as a permanent adult kidney in reptiles, birds, and mammals but is not present at all in lower forms compare MESONEPHROS, PRONEPHROS

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n.
the excretory organ of the fetus, which develops into the kidney and is formed from the rear portion of the nephrogenic cord. It does not become functional until birth, since urea is transferred across the placenta to the mother.

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meta·neph·ros (met″ə-nefґros) pl. metanephґroi [meta- + Gr. nephros kidney] the primordium of the permanent kidney, developing later than and caudal to the mesonephros, from the mesonephric duct and nephrogenic cord. Called also definite, definitive, or hind kidney. metanephric adj

Medical dictionary. 2011.

Look at other dictionaries:

  • métanéphros — ● métanéphros nom masculin (du grec nephros, rein) Troisième et dernière des structures embryonnaires à l origine du rein des vertébrés amniotes, desservie par l uretère secondaire. métanéphros [metanefʀos] n. m. ÉTYM. 1897; de méta , et grec… …   Encyclopédie Universelle

  • metanephros — METANEPHRÓS s.m. (biol.) Rinichiul definitiv care începe să funcţioneze la vertebratele amniote în stadiul de adult. [pr.: fros] – Din fr. métanéphros. Trimis de LauraGellner, 13.09.2007. Sursa: DEX 98 …   Dicționar Român

  • Metanephros — Met a*neph ros, n. [NL., fr. Gr. ? behind + ? kidney.] (Anat.) The most posterior of the three pairs of embryonic renal organs developed in many vertebrates. [1913 Webster] …   The Collaborative International Dictionary of English

  • Metanephros — Metanephros, s. Nieren …   Meyers Großes Konversations-Lexikon

  • Metanephros — ⇒ Nachniere …   Deutsch wörterbuch der biologie

  • metanephros — [met΄ə nef′räs΄] n. pl. metanephroi [met΄ə nef′roi΄] [ModL < META + Gr nephros, kidney: see NEPHRO ] the excretory organ lying behind the mesonephros in an embryo, which in mammals, reptiles, and birds develops into the permanent, or adult,… …   English World dictionary

  • Métanéphros — Le métanéphros est le troisième des trois appareils rénaux différents qui se succèdent pendant la vie utérine des vertébrés supérieurs (mammifères, oiseaux et reptiles). Il correspond au rein. Chez l embryon humain, il apparais durant la 3ème… …   Wikipédia en Français

  • metanephros — metanephric, adj. /met euh nef ros/, n., pl. metanephroi / roy/. Embryol. one of the three embryonic excretory organs of higher vertebrates, becoming the permanent and functional kidney. Cf. mesonephros, pronephros. [1875 80; < NL < Gk meta META… …   Universalium

  • Metanephros — galutinis inkstas statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Metanephros ryšiai: platesnis terminas – šlapimo organai siauresnis terminas – galutinio inksto užuomazginė medžiaga siauresnis terminas –… …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Metanephros — galutinis inkstas statusas T sritis embriologija atitikmenys: lot. Metanephros ryšiai: platesnis terminas – inkstų sistema siauresnis terminas – galutinio inksto užuomazga siauresnis terminas – šlapimo ištekamasis vamzdelis siauresnis terminas –… …   Medicininės histologijos ir embriologijos vardynas

  • metanephros — noun (plural metanephroi) Etymology: New Latin, from meta + Greek nephros kidney more at nephritis Date: 1884 either member of the final and most caudal pair of the three successive pairs of vertebrate renal organs that functions as a permanent… …   New Collegiate Dictionary


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