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metanephros
met·a·neph·ros M0247400 (mĕt′ə-nĕf′rŏs′)n. The third and final excretory organ that develops in a vertebrate embryo. In birds, reptiles, and mammals it replaces the mesonephros as the functional excretory organ and develops into the adult kidney.
[meta- + Greek nephros, kidney.]
met′a·neph′ric (-rĭk) adj.metanephros (ˌmɛtəˈnɛfrɒs) n, pl -roi (-rɔɪ) (Zoology) the last-formed posterior part of the embryonic kidney in reptiles, birds, and mammals, which remains functional in the adult. See also pronephros, mesonephros[C19: New Latin, from meta- + Greek nephros kidney]met•a•neph•ros (ˌmɛt əˈnɛf rɒs)
n., pl. -roi (-roi). an embryonic excretory organ of reptiles, birds, and mammals, which develops into the functional kidney. [1875–80; meta- + Greek nephrós kidney] met`a•neph′ric, adj. Metanephros
metanephros[‚med·ə′ne‚fräs] (embryology) One of the posterior of three pairs of vertebrate renal structures; persists as the definitive or permanent kidney in adult reptiles, birds, and mammals. Metanephros a paired excretory organ in reptiles, birds, mammals, and man that replaces the mesonephros in the course of embryonic development. The uriniferous tubules of the metanephros form from the nonsegmented posterior part of the nephrotome; unlike the uriniferous tubules of the mesonephros, they begin at the malpighian corpuscles. The ends of the tubules of the metanephros open not into the wolffian duct, as in the mesonephros, but into the ureter, an outgrowth of it. metanephros
metanephros [met″ah-nef´ros] (pl. metaneph´roi) (Gr.) the permanent embryonic kidney, developing later than and caudad to the mesonephros. adj., adj metaneph´ric.met·a·neph·ros, pl. met·a·neph·roi (met'ă-nef'ros, -roy), 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 metanephros develops caudal to the mesonephros during its regression, becoming the permanent kidney. Synonym(s): hind kidney [meta- + G. nephros, kidney] metanephros (mĕt′ə-nĕf′rŏs′)n. The third and final excretory organ that develops in a vertebrate embryo. In birds, reptiles, and mammals it replaces the mesonephros as the functional excretory organ and develops into the adult kidney.
met′a·neph′ric (-rĭk) adj.metanephros The embryonic precursor of the adult kidney, located caudal to the mesonephos, which develops after it. The metanephros is formed from mesenchymal tissue arising from fused nephrotomes in the sacral region and from the ureteric bud, an outgrowth of the mesonephric duct.met·a·neph·ros, pl. metanephroi (met'ă-nef'ros, -roy) 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 metanephros develops caudal to the mesonephros during its regression, becoming the permanent kidney. [meta- + G. nephros, kidney]metanephros the functional kidney in adult reptiles, birds and mammals that replaces the MESONEPHROS in the developing embryo.ThesaurusSeekidney |