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Is CSF also considered ECF. Would the equation then become ECF = CSF + Plasma + interstitial fluid?

April 26, 2017CSF ECF equation fluid Interstitial Plasma

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Is CSF also considered ECF. Would the equation then become ECF = CSF + Plasma + interstitial fluid?

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You could consider the extracellular fluid to consist of plasma, interstitial fluid, lymph, cerebrospinal fluid, and even the aqueous humor inside the eye. However, plasma and ISF make up about 99% of the ECF, so the others are usually omitted from this sort of discussion.