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}}</ref> Bleeding can occur [[Internal bleeding|internally]], or externally either through a natural opening such as the [[Mouth (human)|mouth]], [[human nose|nose]], [[ear]], [[urethra]], [[vagina]] or [[anus]], or through a puncture in the [[human skin|skin]].
[[Hypovolemia]] is a massive decrease in blood volume, and death by excessive loss of blood is referred to as [[exsanguination]].<ref>{{cite web|url=http://dictionary.reference.com/browse/exsanguination|title=Dictionary Definitions of Exsanguination|publisher=Reference.com|access-date=2007-06-18|archive-url=https://web.archive.org/web/20070711062056/http://dictionary.reference.com/browse/exsanguination|archive-date=2007-07-11|url-status=live}}</ref> Typically, a healthy person can endure a loss of 10–15% of the total blood volume without serious [[sequela|medical difficulties]] (by comparison, [[blood donation]] typically takes 8–10% of the donor's blood volume).<ref>{{cite web|url=http://www.blood.co.uk/pages/b36faint.html|title=Blood Donation Information|publisher=UK National Blood Service|access-date=2007-06-18 |archive-url = https://web.archive.org/web/20070928035216/http://www.blood.co.uk/pages/b36faint.html <!-- Bot retrieved archive --> |archive-date = 2007-09-28}}</ref> The stopping or controlling of bleeding is called [[hemostasis]] and is an important part of both [[first aid]] and [[surgery]].
The use of [[Cyanoacrylate|cyanoacrylate glue]] to prevent bleeding and seal battle wounds was designed and first used in the [[Vietnam War]]. Today many medical treatments use a medical version of "super glue" instead of using traditional stitches used for small wounds that need to be closed at the skin level. This prevents the need of removing stitches at some future visit.
==Types==
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