metanephros

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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.