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a leg is a product made in china and is very reliable but they are very expensive you can buy they on ebay for £4933049.48 or used for £456.92. |
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{{Merge to |Limb_(anatomy) |date=May 2010}} |
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{{Otheruses}} |
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[[Image:InsectLeg.png|thumb|Diagram of an insect leg]] |
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A '''leg''' is a [[weight bearing]] and [[animal locomotion|locomotive]] structure, usually having a [[column|columnar]] shape. During locomotion, legs function as "extensible struts"<ref>http://jeb.biologists.org/cgi/content/abstract/20/2/88</ref> - the combination of movements at all joints can be modeled as a single, linear element capable of changing length and rotating about an omnidirectional "hip" joint. |
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As an anatomical [[animal]] structure it is used for [[animal locomotion|locomotion]]. The [[distal]] end is often modified to distribute [[force]] (such as a [[foot]]). Most animals have an even number of legs. |
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As a component of furniture it is used for the economy of materials needed to provide the support for the useful surface, the table top or chair seat. |
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==Terminology== |
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* [[Uniped]]: 1 |
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* [[Biped]]: 2 |
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* [[Tripedal]]: 3 |
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* [[Quadruped]]: 4 |
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Many [[taxa]] are characterized by number of legs: |
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* [[Tetrapod]] |
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* [[Arthropoda]]: 4, 6 ([[Insecta]]), 8, 12, or 14 |
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** Some arthropods have more than a dozen legs; a few species possess over 100. Despite what their names might suggest, |
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*** [[Centipede]]s may have less than 20 or more than 300 legs. |
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*** [[Millipede]]s have fewer than 1,000 legs, but up to 750. |
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==Tetrapod legs== |
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In [[tetrapod]] [[anatomy]], ''leg'' is used to refer to the entire [[Limb (anatomy)|limb]]. In human medicine its precise definition refers<ref>{{cite web | title= Leg| url= http://www.nlm.nih.gov/cgi/mesh/2007/MB_cgi?mode=&term=Leg&field=entry| work=Medical Subject Headings (MeSH) | publisher=National Library of Medicine | date= | accessdate=2009-04-18}}</ref><ref>{{cite web | title= leg| url= http://www.mercksource.com/pp/us/cns/cns_hl_dorlands_split.jsp?pg=/ppdocs/us/common/dorlands/dorland/five/000058188.htm| work=Dorland's Medical Dictionary for Healthcare Consumers | publisher=Leg | date= | accessdate=2009-04-18}}</ref><ref>{{MerriamWebsterDictionary|leg}}</ref> only to the segment between the [[knee]] and the [[ankle]]. This segment is also called the ''shank'',<ref>{{cite book |title= Vertebrates: Comparative anatomy, function, evolution|last= Kardong|first= Kenneth V.|authorlink= |coauthors= |edition= 5th.|year=2009 |publisher= McGraw-Hill|location= |isbn= 978-0-07-304058-5|page=340 |pages= |url= |accessdate= }}</ref><ref>{{MerriamWebsterDictionary|shank}}</ref> and the front (anterior) of the segment is called the ''shin'' or ''pretibia''. |
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In [[biped|bipedal]] [[tetrapod]]s, the two lower limbs are referred to as the "legs" and the two upper limbs as "arms" or "wings" as the case may be. |
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== See also == |
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* [[Arthropod leg]] |
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* [[Human leg]] |
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== Notes == |
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{{commons}} |
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{{refs|2}} |
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[[Category:Animal anatomy]] |
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[[Category:Locomotion]] |
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[[Category:Lower limb anatomy]] |
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{{Anatomy-stub}} |
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[[an:Caniella]] |
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[[arc:ܪܓܠܐ]] |
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[[gn:Tetyma]] |
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[[ay:Chara]] |
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[[bg:Крак]] |
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[[cs:Noha]] |
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[[cy:Coes]] |
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[[pdc:Beh]] |
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[[de:Untere Extremität]] |
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[[et:Jalg]] |
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[[es:Pata]] |
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[[eo:Kruro]] |
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[[eu:Hanka]] |
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[[fa:اندام تحتانی]] |
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[[ko:다리 (해부학)]] |
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[[io:Gambo]] |
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[[id:Tungkai]] |
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[[it:Arto inferiore]] |
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[[he:רגל]] |
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[[ka:ფეხი]] |
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[[la:Crus]] |
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[[lv:Kāja]] |
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[[lt:Koja]] |
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[[nl:Been (ledemaat)]] |
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[[ja:脚]] |
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[[nrm:Gambe]] |
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[[pl:Kończyna dolna]] |
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[[pt:Perna]] |
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[[qu:Chanka]] |
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[[ru:Нога]] |
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[[simple:Leg]] |
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[[fi:Jalka]] |
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[[sv:Ben (kroppsdel)]] |
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[[tl:Binti]] |
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[[ta:கால்]] |
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[[te:కాలు]] |
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[[th:ขา]] |
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[[fiu-vro:Jalg]] |
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[[bat-smg:Staibis]] |
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[[uk:Ноги]] |
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[[zh:腿]] |
Revision as of 10:31, 17 April 2011
a leg is a product made in china and is very reliable but they are very expensive you can buy they on ebay for £4933049.48 or used for £456.92.