Extracellular fluid

Extracellular fluid is body fluid that exists outside cells. It makes up about one-third (1/3) of all body water.

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Extracellular Fluid Media

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  The distribution of the total body water in mammals between the intracellular compartment and the extracellular compartment, which is, in turn, subdivided into interstitial fluid and smaller components, such as the blood plasma, the cerebrospinal fluid and lymph

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  Cell membrane details between extracellular and intracellular fluid

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  Sodium–potassium pump and the diffusion between extracellular fluid and intracellular fluid

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  Differences in the concentrations of ions giving the membrane potential

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  Formation of interstitial fluid from blood

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  Diagram showing the formation of lymph from interstitial fluid (labeled here as "tissue fluid"). The tissue fluid is entering the blind ends of lymph capillaries (shown as deep green arrows).