Editing Body fluid (section)

{{Short description|Liquids inside of the body, sometimes excreted or secreted}}
{{human-centric}}
[[File:Cellular Fluid Content.jpg|thumb|Intracellular and extracellular fluid compartments. The extracellular fluid compartment is further subdivided into the interstitial fluid and the intravascular fluid compartments.]]
'''Body fluids''', '''bodily fluids''', or '''biofluids''', sometimes '''body liquids''', are [[liquid]]s within the [[Body (biology)|body]] of an organism.<ref name=Tabers_BodyFluid>{{Cite web|url=https://www.tabers.com/tabersonline/view/Tabers-Dictionary/748149/all/fluid?q=body+fluid#4|title=body fluid|access-date=2021-06-22|website=Taber's online – Taber's medical dictionary|archive-url=https://web.archive.org/web/20210621125044/https://www.tabers.com/tabersonline/view/Tabers-Dictionary/748149/all/fluid?q=body+fluid|archive-date=2021-06-21|url-status=live}}</ref> In lean healthy adult men, the total [[body water]] is about 60% (60–67%) of the total [[Human body weight|body weight]]; it is usually slightly lower in women (52–55%).<ref>{{cite web| title = The water in you|url = https://water.usgs.gov/edu/propertyyou.html | publisher =  [[Howard Perlman]]| date = December 2016 }}</ref><ref name="lote">{{cite book |last=Lote |first=Christopher J. |title= Principles of Renal Physiology, 5th edition|publisher=Springer |page=2}}</ref> The exact percentage of fluid relative to body weight is inversely proportional to the percentage of body fat. A lean {{Convert|70|kg|lb|abbr=on}} man, for example, has about 42 (42–47) liters of water in his body.

The total body of water is divided into [[fluid compartments]],<ref name=Tabers_BodyFluid /> between the [[Fluid compartments#Intracellular compartment|intracellular fluid]] compartment (also called space, or volume) and the [[extracellular fluid]] (ECF) compartment (space, volume) in a two-to-one ratio: 28 (28–32) liters are inside cells and 14 (14–15) liters are outside cells.

The ECF compartment is divided into the [[interstitial fluid]] volume – the fluid outside both the cells and the blood vessels – and the [[Blood vessel|intravascular]] volume (also called the vascular volume and [[blood plasma]] volume) – the fluid inside the blood vessels – in a three-to-one ratio: the interstitial fluid volume is about 12 liters; the vascular volume is about 4 liters.

The interstitial fluid compartment is divided into the [[lymphatic fluid]] compartment – about 2/3, or 8 (6–10) liters, and the [[transcellular fluid]] compartment (the remaining 1/3, or about 4 liters).<ref>{{Cite journal |last=Santambrogio |first=Laura |date=2018 |title=The Lymphatic Fluid |journal=International Review of Cell and Molecular Biology |volume=337 |pages=111–133 |doi=10.1016/bs.ircmb.2017.12.002 |pmid=29551158 |isbn=9780128151952 }}</ref>

The vascular volume is divided into the [[venous]] volume and the [[arterial]] volume; and the arterial volume has a conceptually useful but unmeasurable subcompartment called the [[effective arterial blood volume]].<ref>{{cite journal | doi = 10.1016/B978-0-12-381462-3.00037-9| title = Natriuretic Hormones| journal = Seldin and Giebisch's the Kidney| pages = 1241–1281| year = 2013| last1 = Vesely| first1 = David L| isbn = 9780123814623}}</ref>