Tubular fluid is the fluid in the renal tubule 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 .
+Concentration (mM) of substances in different segments of nephron and 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 |
sodium | |||||||||
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