Difference between revisions of "Organ"

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[[Organ]]
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'''Definition'''
  
1. An [[instrument]] or [[medium]] by which some important [[action]] is performed, or an important [[end]] accomplished; as, legislatures, courts, armies, taxgatherers, etc, are [[organs]] of [[government]].
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''noun, plural: organs''
  
2. (Science: biology) A [[natural]] part or [[structure]] in an [[animal]] or a [[plant]], capable of performing some special [[action]] (termed its [[function]]), which is [[essential]] to the [[life]] or well-being of the whole; as, the [[heart]], [[lungs]], etc, are [[organs]] of animals; the [[root]], [[stem]], [[foliage]], etc, are [[organs]] of [[plants]].
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A group of [[tissues]] that perform a specific [[function]] or group of functions
  
In [[animals]] the [[organs]] are generally made up of several [[tissues]], one of which usually [[predominates]], and [[determines]] the [[principal]] [[function]] of the [[organ]]. [[Groups]] of [[organs]] constitute a system. See system.
 
  
3. A [[component]] part performing an [[essential]] [[office]] in the working of any [[complex]] [[machine]]; as, the [[cylinder]], [[valves]], crank, etc, are [[organs]] of the [[steam engine]].
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'''Supplement'''
  
4. A [[medium]] of [[communication]] between one [[person]] or [[body]] and another; as, the [[secretary]] of [[state]] is the [[organ]] of [[communication]] between the [[government]] and a [[foreign]] [[power]]; a newspaper is the [[organ]] of its editor, or of a party, sect, etc.
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An organ pertains to a group of [[tissues]] that perform a specific [[function]] or group of functions. Typically, an organ would have the main tissue component that characterizes the organ and other [[tissue]]s, such as those associated with the organ's structure and function. For instance, in animals, an organ would usually consist of the main tissue together with the parenchymal (functional) and the stromal (structural) tissues. In particular, the heart is comprised of the [[myocardium]] as the main tissue component and other tissues such as [[nerve]]s, [[connective tissue]]s, and [[blood vessel]]s. In animals, organs include [[heart]], [[lungs]], [[brain]], [[eye]], [[stomach]], [[spleen]], [[bone]]s, [[pancreas]], [[kidney]]s, [[liver]], [[intestine]]s, [[skin]], [[urinary bladder]] and sex organs. In [[plant]]s, organs include [[root]]s, [[stem]]s, [[leaves]], [[flower]]s, [[seed]]s and [[fruit]]s.
  
5. [Cf. AS. [[Organ]], [[fr]]. L. [[Organum]].
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Organs that are functionally related comprise the so-called ''[[organ system]]''. For example, the human [[cardiovascular system]] whose primary role is to pump and channel [[blood]] to and from the body and [[lung]]s is comprised of [[heart]], [[blood]], and [[blood vessel]]s.
  
A [[wind]] [[instrument]] containing numerous [[pipes]] of various [[dimensions]] and kinds, which are filled with [[wind]] from a [[bellows]], and played upon by [[means]] of keys [[similar]] to those of a piano, and sometimes by [[foot]] keys or [[pedals]]; formerly used in the plural, each [[pipe]] being considired an [[organ]]. ''The [[deep]], majestic, solemn [[organs]] [[blow]].'' ([[pope]])
 
  
Chaucer used the [[form]] orgon as a plural. ''The [[merry]] orgon . . . That in the church goon [go]'' [[barrel]] [[organ]], Choir [[organ]], Great [[organ]], etc. See [[barrel]], Choir, etc.
 
  
(Science: anatomy) Cabinet [[organ]], a [[passage]] in which the [[tonic]] or [[dominant]] is sustained continuously by one part, while the other [[parts]] move.
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''Word origin:'' Latin ''organum''
  
Origin: L. [[Organum]], [[gr]].; [[akin]] to [[work]], and E. Work: [[cf]]. [[F]]. Organe. See [[work]], and [[cf]]. Orgue, Orgy.
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''See also:''
A fully [[differentiated]] [[structural]] and [[functional]] [[unit]] in an [[animal]] that is specialized for some [[particular]] [[function]].Any [[functional]] [[unit]] of an [[organism]] which combine [[forces]] to perform a common [[role]] en masse.
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* viscus
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* ogan system
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* tissue
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''Related term(s):''
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* [[organism]]
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* [[organelle]]
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* [[organ system]]
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* [[eco-organ]]
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* [[gustatory organ]]
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* [[sense organ]]
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* [[organ of corti]]
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* [[organ specificity]]
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* [[olfactory organ]]
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* [[floating organ]]
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* [[wandering organ]]

Latest revision as of 08:44, 17 September 2017

Definition

noun, plural: organs

A group of tissues that perform a specific function or group of functions


Supplement

An organ pertains to a group of tissues that perform a specific function or group of functions. Typically, an organ would have the main tissue component that characterizes the organ and other tissues, such as those associated with the organ's structure and function. For instance, in animals, an organ would usually consist of the main tissue together with the parenchymal (functional) and the stromal (structural) tissues. In particular, the heart is comprised of the myocardium as the main tissue component and other tissues such as nerves, connective tissues, and blood vessels. In animals, organs include heart, lungs, brain, eye, stomach, spleen, bones, pancreas, kidneys, liver, intestines, skin, urinary bladder and sex organs. In plants, organs include roots, stems, leaves, flowers, seeds and fruits.

Organs that are functionally related comprise the so-called organ system. For example, the human cardiovascular system whose primary role is to pump and channel blood to and from the body and lungs is comprised of heart, blood, and blood vessels.


Word origin: Latin organum

See also:

  • viscus
  • ogan system
  • tissue

Related term(s):