| a portion of the nephron in the kidney that functions in concentrating urine and in maintaining salt, water, and sugar balance. |
convoluted tubule con·vo·lut·ed tubule (kŏn'və-l&oomacr;'tĭd)
n.
The highly convoluted segments of nephron in the renal labyrinth of the kidney made up of the proximal tubule leading from the Bowman's capsule to the descending limb of Henle's loop and the distal tubule leading from the ascending limb of Henle's loop to a collecting tubule.