Section VI. The Kidneys And The Body Fluids

This section was written following fruitful discussions with my colleagues Peter Bie, Niels-Henrik Holstein-Rathlou, Paul Leyssac, Finn Michael Karlsen, and medical students Margrethe Lynggaard and Mads Dalsgaard.

The concept flux is net-transport of substance per time unit across an area unit. Flux is equal to concentration multiplied by flow or mol per time unit across a barrier area. - Frequently used abbreviations in this section are ECV for extracellular volume, ICV for intracellular volume, ISF for interstitial or tissue fluid, and GFR for glomerular filtration rate.