My watch list  

Tubular fluid

Tubular fluid is the fluid in the tubules of the kidney. It starts as a renal ultrafiltrate in the glomerulus, changes composition through the nephron, and ends up as urine leaving through the ureters.

Composition table

The composition of tubular fluid changes throughout the nephron, from the proximal tubule to the collecting duct:

Concentration (mM) of substances in different segments of nephron and collecting duct system
Substance proximal tubule loop of Henle Distal convoluted tubule Collecting duct system
S1 S2 S3 descending limb thin ascending limb thick ascending limb connecting tubule initial collecting tubule cortical collecting ducts medullary collecting ducts
Na+ 142[1] 142[1] 100[1] 70[1] 40[1]


  1. ^ a b c d e Walter F., PhD. Boron. Medical Physiology: A Cellular And Molecular Approaoch. Elsevier/Saunders. ISBN 1-4160-2328-3.  Page 777
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Tubular_fluid". A list of authors is available in Wikipedia.
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE