Editing Extracellular fluid (section)

===Transcellular fluid===
{{See also|Fluid compartments#Transcellular compartment}}

Transcellular fluid is formed from the [[Cell physiology#Physiological processes|transport activities of cells]], and is the smallest component of extracellular fluid. These fluids are contained within [[epithelial]] lined spaces. Examples of this fluid are [[cerebrospinal fluid]], [[aqueous humor]] in the eye, [[serous fluid]] in the [[serous membranes]] lining [[Body cavity|body cavities]], [[perilymph]] and [[endolymph]] in the inner ear, and [[synovial fluid|joint fluid]].<ref name=":1" /><ref>{{Cite book|title=Physiology | edition = 5th |last=Constanzo|first=Linda S. | name-list-style = vanc |publisher=Elsevier Saunders|year=2014|isbn=9781455708475|pages=264}}</ref> 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 ion]]s, and [[bicarbonate]] ions.