renal tubule

(redirected from Kidney tubule)
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tubule

 [too´būl]
a small tube; especially, a minute canal found in various structures or organs of the body. adj., adj tu´bular.
collecting t's the terminal channels of the nephrons, which open on the summits of the renal pyramids in the renal papillae.
convoluted t's channels that follow a tortuous course; there are convoluted renal tubules and convoluted seminiferous tubules.
dentinal t's the tubular structures of the teeth.
galactophorous t's small channels for the passage of milk from the secreting cells in the mammary gland.
Henle's t's the straight ascending and descending portions of a renal tubule forming Henle's loop.
lactiferous t's galactophorous tubules.
mesonephric t's the tubules comprising the mesonephros, or temporary kidney, of amniotes.
metanephric t's the tubules comprising the permanent kidney of amniotes.
renal tubule the minute canals composing the substance of the kidney and secreting, collecting and conducting the urine; in the glomerulus they have a basement membrane and epithelial lining.
seminiferous t's the tubules of the testis, in which spermatozoa develop and through which they leave the gland.
uriniferous t's renal tubules; channels for the passage of urine.

renal tubule

The part of a nephron through which renal filtrate from the renal corpuscle flows and is changed to urine by reabsorption and secretion. The parts, in order, are the proximal convoluted tubule, the loop of Henle, the distal convoluted tubule, and collecting tubule.
See: kidney for illus; nephron
See also: tubule
References in periodicals archive ?
By disabling the PKD1 gene in mice, researchers hope to produce rodents with the characteristic cystic kidney tubules.
In this study, we demonstrate that reduced PGC1[alpha] expression in renal proximal tubular cells is related to abnormal dynamics and quality control of mitochondria under high-glucose conditions and that PGC1[alpha] activation attenuates the effect of high-glucose conditions on kidney tubules in vivo and in vitro.
Histopathologically, mild hyperemia in the liver (Figure 4a), degeneration of the epithelium of kidney tubules and very severe necrosis in the interstitial area (Figure 4b), the enlargement in the gill filaments (Figure 4c), cells having picnotic nucleus (Figure 4d) and several necrotic areas in the spleen were observed.
lB).Tubular acute coagulant necrosis with picnotic nucleus occurred in the epithelium cells of kidney tubules (Fig.
Myosin, which is better known for its role in muscle contraction, may allow kidney tubules to expand and contract.
(20) The criteria used in the appraisal were the atrophy and dilatation of the kidney tubules, the loss of the brush border in the proximal tubules, the accumulation of inflammatory cells in the interstitial area, and the intraluminal cast.
Meprins also cleave two cytoskeletal proteins, villin and actin, which would cause injury to the brush border membranes of proximal kidney tubules [12].
In the kidney tubules, increased iNOS stimulated by cytokines in the proximal tubules specifically indicates that the changes we observed may be related to NO.
Table 2: Comparison of Mean Scoring for Histological changes in Fetal Kidney Tubules per 10 Fields among Various Groups.
MUC1 marks collecting tubules, renal vesicles, comma- and S-shaped bodies in human developing kidney tubules, renal vesicles, comma- and s-shaped bodies in human kidney.
Scientists grew suspicious of proton pump inhibitors because they can cause acute interstitial nephritis, (42-44) a condition in which spaces between the kidney tubules become swollen and interfere with filtration of toxins out of one's blood.
TRMP6 messenger ribonucleic acid, which is expressed in intestinal epithelial cells and kidney tubules, has a crucial role for transcellular [Mg.sup.2+] absorption from the intestine and from the distal convoluted tubules.