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trachea
trachea or windpipe, principal tube that carries air to and from the lungs. It is about 4 1/2 in. (11.4 cm) long and about 3/4 in. (1.9 cm) in diameter in the adult. It extends from the larynx to the bronchial tubes and is situated in front of the esophagus (see respiration ). The trachea consists of a supporting layer of connective and muscular tissue in which are embedded from 16 to 20 U-shaped rings of hard cartilage that encircle the front of the tube. Tiny hairs, or cilia, in the mucous membrane lining keep dust and other foreign particles from entering the lungs. The foreign material becomes trapped in the mucus and is swept by the beating cilia to the nose or mouth, where it is discharged from the body. The air tubes of insects and other arthropods are also called trachea. |
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"trachea." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "trachea." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1E1-trachea.html "trachea." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-trachea.html |
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trachea
tra·che·a / ˈtrākēə/ • n. (pl. -che·ae / -kēˌē/ or -che·as ) Anat. a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe. ∎ Entomol. each of a number of fine chitinous tubes in the body of an insect, conveying air directly to the tissues. ∎ Bot. any duct or vessel in a plant, providing support and conveying water and salts. DERIVATIVES: tra·che·al adj. tra·che·ate / -it; -ˌāt/ adj. |
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"trachea." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "trachea." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O999-trachea.html "trachea." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-trachea.html |
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trachea
trachea
1. (or windpipe) The tube in air-breathing vertebrates that conducts air from the throat to the bronchi. It is strengthened with incomplete rings of cartilage. 2. An air channel in insects and most other terrestrial arthropods. Tracheae occur as ingrowths of the body wall. They open to the exterior by spiracles and branch into finer channels (tracheoles) that terminate in the tissues (see also air sac). Pumping movements of the abdominal muscles cause air to be drawn into and out of the tracheae. |
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"trachea." A Dictionary of Biology. 2004. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "trachea." A Dictionary of Biology. 2004. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O6-trachea.html "trachea." A Dictionary of Biology. 2004. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-trachea.html |
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trachea
trachea
1. One of the cuticular tubes that make up the respiratory system of an insect. The tracheae ramify throughout the body, terminating in fine, intracellular branches (tracheoles). See SPIRACLE. 2. In air-breathing vertebrates, the ‘windpipe’, leading from the throat and dividing into two bronchii, which enter the lungs. |
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MICHAEL ALLABY. "trachea." A Dictionary of Zoology. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "trachea." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O8-trachea.html MICHAEL ALLABY. "trachea." A Dictionary of Zoology. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-trachea.html |
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trachea
trachea (anat.) tube extending from the larynx to the bronchi. XVI (earlier in trache arteria or arterie XV). — medL. trāchēa, for late L. trāchīa — Gr. trākheîa, fem. of trākhús rough.
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T. F. HOAD. "trachea." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. T. F. HOAD. "trachea." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O27-trachea.html T. F. HOAD. "trachea." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-trachea.html |
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trachea
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"trachea." World Encyclopedia. 2005. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "trachea." World Encyclopedia. 2005. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O142-trachea.html "trachea." World Encyclopedia. 2005. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-trachea.html |
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trachea
trachea A vessel; a tube-like series of non-living cells in the xylem of a plant, supplying mechanical support and involved in the transport of water and salts.
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MICHAEL ALLABY. "trachea." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "trachea." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O7-trachea.html MICHAEL ALLABY. "trachea." A Dictionary of Plant Sciences. 1998. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-trachea.html |
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TRACHEA
TRACHEA [Stress: ‘tra-KEE-a’]. An anatomical term for the tube carrying air to and from the lungs, commonly known as the windpipe. See SPEECH.
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TOM McARTHUR. "TRACHEA." Concise Oxford Companion to the English Language. 1998. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. TOM McARTHUR. "TRACHEA." Concise Oxford Companion to the English Language. 1998. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O29-TRACHEA.html TOM McARTHUR. "TRACHEA." Concise Oxford Companion to the English Language. 1998. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O29-TRACHEA.html |
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trachea
trachea (tray-kiă) n. the windpipe: the part of the air passage between the larynx and the main bronchi.
—tracheal (tray-ki-ăl) adj. |
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"trachea." A Dictionary of Nursing. 2008. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "trachea." A Dictionary of Nursing. 2008. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O62-trachea.html "trachea." A Dictionary of Nursing. 2008. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-trachea.html |
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trachea
trachea
•Achaea, aliyah, Almería, Apia, Bahía, Caesarea, Cassiopeia, Chaldea, Cytherea, Euboea, foreseer, freer, galleria, gynaecea, Iphigenia, Kampuchea, kea, keyer, Latakia, Leah, Lucia, Nicaea, Nicosia, onomatopoeia, Oriya, Pangaea, Pantelleria, pharmacopoeia, pizzeria, ria, rupiah, sangría, seer, sharia, Shia, skier, spiraea (US spirea), Tanzania, taqueria, Tarpeia, Thea, trachea, trattoria, urea
•sightseer
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"trachea." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "trachea." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O233-trachea.html "trachea." Oxford Dictionary of Rhymes. 2007. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-trachea.html |
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