Transcellular fluid

Transcellular fluid is the portion of total body water contained within epithelial lined spaces. It is the smallest component of extracellular fluid, which also includes interstitial fluid and plasma. It is often not calculated as a fraction of the extracellular fluid, but it is about 2.5% of the total body water or 5% of extracellular fluid. Examples of this fluid are cerebrospinal fluid, ocular fluid and joint fluid.^[1]

Composition

Due to the varying locations of transcellular fluid, the composition changes dramatically. Some of the electrolytes present in the transcellular fluid are sodium ions, chloride ions, and bicarbonate ions.

Physiological Function

There are also varied functions for the trans-cellular fluid. In the joints, it serves a lubrication function, while the urine allows for the removal of electrolytes and molecules from the body.

References

↑ Fluid Physiology: 2.1 Fluid Compartments

External links

Physiology of the kidneys and acid-base physiology

Renal function

Secretion	clearance Pharmacokinetics Clearance of medications Urine flow rate

Reabsorption	Solvent drag sodium chloride urea glucose oligopeptides protein

Renal function	Glomerular filtration rate Creatinine clearance Renal clearance ratio Urea reduction ratio Kt/V Standardized Kt/V Measures of dialysis Hemodialysis product PAH clearance (Effective renal plasma flow Extraction ratio)

Filtration	Renal blood flow Ultrafiltration Countercurrent exchange Filtration fraction

Hormones

Acid-base balance

Body water: Intracellular fluid/Cytosol

Buffering

Other

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