proximal tubule

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Related to Proximal convoluted tubule: loop of Henle, Distal convoluted tubule, Collecting duct

proximal tubule

The first part of the tubular system of a nephron after the Bowman's capsule. It has convoluted and straight segments and is followed by the distal tubule.

proximal tubule

the convoluted tube between the loop of Henle and Bowman's capsule in the vertebrate kidney.


a small tube; a minute canal found in various structures or organs of the body.

collecting t's
the terminal channels of the nephrons which open on the summits of the renal papillae or renal crests.
convoluted t's
channels which follow a tortuous course. See also renal tubules (below) and tubuli contorti.
dentinal t's
minute channels in the dentine of a tooth that extend from the pulp cavity to the cement or the enamel. Called also dentinal canaliculi.
galactophorous t's
small channels for the passage of milk from the secreting cells in the mammary gland. Called also lactiferous ducts.
Henle's t's
see henle's tubules.
lactiferous t's
see lactiferous ducts.
mesonephric t's
the tubules comprising the mesonephros, or temporary kidney, of amniotes.
metanephric t's
the tubules comprising the permanent kidney of amniotes.
proximal tubule
intrarenal site for the reabsorption of most of the protein in the tubular fluid.
proximal convoluted tubule
the portion of the nephron immediately succeeding the glomerulus; susceptible to disease because of its early exposure to toxins in the glomerular filtrate.
renal t's
the minute canals made up of basement membrane and lined with epithelium, composing the substance of the kidney and secreting, reabsorbing, collecting and conducting the urine. Include proximal convoluted, the nephron loop (containing the proximal straight tubule, descending and ascending thin, and the distal straight tubules) and the distal convoluted tubules.
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.

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