52 lines
2.9 KiB
Markdown
52 lines
2.9 KiB
Markdown
---
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title: "Body fluid"
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chunk: 1/1
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source: "https://en.wikipedia.org/wiki/Body_fluid"
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category: "reference"
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tags: "science, encyclopedia"
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date_saved: "2026-05-05T07:26:39.339802+00:00"
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instance: "kb-cron"
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---
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Body fluids, bodily fluids, or biofluids, sometimes body liquids, are liquids within the body of an organism. In lean healthy adult men, the total body water is about 60% (60–67%) of the total body weight; it is usually slightly lower in women (52–55%). The exact percentage of fluid relative to body weight is inversely proportional to the percentage of body fat. A lean 70 kg (150 lb) man, for example, has about 42 (42–47) liters of water in his body.
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The total body of water is divided into fluid compartments, between the 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.
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The ECF compartment is divided into the interstitial fluid volume – the fluid outside both the cells and the blood vessels – and the 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.
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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).
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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.
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== Compartments by location ==
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intracellular fluid (ICF), which consist of cytosol and fluids in the cell nucleus
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Extracellular fluid
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Intravascular fluid (blood plasma)
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Interstitial fluid
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Lymphatic fluid (sometimes included in interstitial fluid)
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Transcellular fluid
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== Health ==
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=== Clinical samples ===
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Clinical samples are generally defined as non-infectious human or animal materials including blood, saliva, excreta, body tissue and tissue fluids, and also FDA-approved pharmaceuticals that are blood products. In medical contexts, it is a specimen taken for diagnostic examination or evaluation, and for identification of disease or condition.
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== See also ==
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Basic reproduction number
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Blood-borne diseases
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Clinical pathology
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Humorism
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Hygiene
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Ritual cleanliness
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== References ==
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== Further reading ==
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Paul Spinrad. (1999) The RE/Search Guide to Bodily Fluids. Juno Books. ISBN 1-890451-04-5
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John Bourke. (1891) Scatalogic Rites of All Nations. Washington, D.C.: W.H. Lowdermilk.
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== External links ==
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De Luca LA, Menani JV, Johnson AK (2014). Neurobiology of Body Fluid Homeostasis: Transduction and Integration. Frontiers in Neuroscience. Boca Raton: CRC Press/Taylor & Francis. ISBN 9781466506930. PMID 24829987. |