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Back to Basics: Water breakdown
Most of the water is in the intracellular space. Approximately 2/3 or 67% of TBW is found inside cells. That leaves one-third or 33% in the extracellular space. Most of the extracellular fluid, 3/4 or 75%, is in the interstitial space. The last 1/4 or 25% is in the IV space. If fractions work better…
