ureteric bud


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bud

 [bud]
1. a structure on a plant, often round, that encloses an undeveloped flower or leaf.
2. something resembling the bud of a plant, especially a protuberance in the embryo from which an organ or part develops.
end bud the remnant of the embryonic primitive knot, from which arises the caudal part of the trunk.
limb bud one of the four lateral swellings appearing in vertebrate embryos, which develop into the two pairs of limbs.
tail bud
the primordium of the caudal appendage.
taste b's end organs of the gustatory nerve containing the receptor surfaces for the sense of taste.
ureteric bud a dorsal outgrowth of the mesonephric duct near its entry into the cloaca; it is the primordium of the ureter, renal pelvis, calices, and collecting tubules of the kidneys.
bud of urethra bulb of urethra.

met·a·neph·ric di·ver·tic·u·lum

an outgrowth from the caudal portion of the mesonephric duct on either side, which grows cephalodorsally to make contact with the masses of metanephrogen tissue (nephric blastemas) and give rise to the epithelial lining of the ureter and of the pelvis and the collecting ducts of the kidney.
References in periodicals archive ?
In the control group, the ureteric bud branched as incubation time went on and finally mature nephrons formed surrounding the tips of the ureteric bud.
Citation: "Directed differentiation of human pluripotent cells to ureteric bud kidney progenitor-like cells"; Yun Xia et al.; Nature Cell Blology, 2013; DOI: 10.1038/ncb2872
Retinoic acid is reported to control the pattern of developing kidney through expression of tyrosine kinase receptor, which modulates morphogenesis of branches of ureteric bud (Bhat and Manolesscu, 2008).These receptors are encoded by a proto- oncogene Ret; which is responsible for formation of the ureteric bud and its branching in the kidney (Dressler, 2002).
Lhx1 is chiefly expressed in the ureteric bud and induced in mesenchymal aggregates and differentiating comma-and S-shaped bodies (Barnes et al.
Bilateral collecting system duplication is a very rare abnormality, including the splitting of the ureteric bud. (4) Complete ureteral duplication with two separate openings in the urinary bladder is also extremely rare.
(2) There are several theories to explain the occurrence of supernumerary kidney: a) bifurcation of ureteric bud with independent penetration into metanephrogenic blastema that develop and divide in two kidneys; b) two independent ureteral buds that penetrate the metanephrogenic blastema that divides into two and c) fragmentation of metanephrogenic blastema due to linear infarcts.
Galectin-3 has been detected in the apical domains of ureteric bud branches in a mice embryo study.