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duodenum
duodenum The first and shortest segment of the small intestine. For up to 3 or 4 hours after a meal it receives spurts of partly digested food (chyme) from the stomach. Juices pour into it at this appropriate time from the pancreas and from the gall bladder, both close by, stimulated to do so by hormones secreted from the duodenum itself in response to the chyme's arrival. Because the juices are alkaline, stomach acid is normally neutralized here, but excessive acidity has been linked to the duodenum's propensity to develop ulcers.
Stuart Judge See alimentary system. |
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COLIN BLAKEMORE and SHELIA JENNETT. "duodenum." The Oxford Companion to the Body. 2001. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. COLIN BLAKEMORE and SHELIA JENNETT. "duodenum." The Oxford Companion to the Body. 2001. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O128-duodenum.html COLIN BLAKEMORE and SHELIA JENNETT. "duodenum." The Oxford Companion to the Body. 2001. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O128-duodenum.html |
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duodenum
duodenum The first section of the small intestine of vertebrates. It is the site where food from the stomach is subjected to the action of bile (from the bile duct) and pancreatic enzymes (from the pancreatic duct) as well as the enzymes secreted by digestive glands in the duodenum itself (see succus entericus), which are required in the breakdown of proteins, carbohydrates, and fats. By neutralizing the acidic secretions of the stomach, the duodenum provides an alkaline environment necessary for the action of the intestinal enzymes.
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"duodenum." A Dictionary of Biology. 2004. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "duodenum." A Dictionary of Biology. 2004. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O6-duodenum.html "duodenum." A Dictionary of Biology. 2004. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-duodenum.html |
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duodenum
du·o·de·num / ˌd(y)oōəˈdēnəm; d(y)oōˈädn-əm/ • n. (pl. -nums or -na / -nə/ ) Anat. the first part of the small intestine immediately beyond the stomach, leading to the jejunum. DERIVATIVES: du·o·de·nal / -ˈdēnl; -ˈädnəl/ adj. |
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"duodenum." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "duodenum." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O999-duodenum.html "duodenum." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-duodenum.html |
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duodenum
duodenum First part of the small intestine, between the stomach and the jejunum; the major site of digestion. Pancreatic juice and bile are secreted into the duodenum. So called because it is about twelve fingerbreadths in length. See also gastro‐intestinal tract.
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DAVID A. BENDER. "duodenum." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. DAVID A. BENDER. "duodenum." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O39-duodenum.html DAVID A. BENDER. "duodenum." A Dictionary of Food and Nutrition. 2005. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O39-duodenum.html |
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duodenum
duodenum (dew-ŏ-deen-ŭm) n. the first of the three parts of the small intestine. It extends from the pylorus of the stomach to the jejunum. The duodenum receives bile from the gall bladder and pancreatic juice from the pancreas.
—duodenal adj. |
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"duodenum." A Dictionary of Nursing. 2008. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "duodenum." A Dictionary of Nursing. 2008. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O62-duodenum.html "duodenum." A Dictionary of Nursing. 2008. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-duodenum.html |
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duodenum
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"duodenum." World Encyclopedia. 2005. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "duodenum." World Encyclopedia. 2005. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O142-duodenum.html "duodenum." World Encyclopedia. 2005. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-duodenum.html |
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duodenum
duodenum XIV. — medL. (short for intestinum duodenum digitorum ‘of twelve digits’; so named from its length), f. duodēnī, distributive of duodecim twelve (see prec.).
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T. F. HOAD. "duodenum." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. T. F. HOAD. "duodenum." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O27-duodenum.html T. F. HOAD. "duodenum." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-duodenum.html |
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duodenum
duodenum In vertebrates, the section of the alimentary canal that lies immediately behind the stomach, forming the start of the intestine.
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MICHAEL ALLABY. "duodenum." A Dictionary of Zoology. 1999. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "duodenum." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O8-duodenum.html MICHAEL ALLABY. "duodenum." A Dictionary of Zoology. 1999. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-duodenum.html |
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duodenum
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"duodenum." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "duodenum." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-X-duodenum.html "duodenum." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-X-duodenum.html |
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duodenum
duodenum
•minimum • maximum • optimum
•chrysanthemum, helianthemum
•cardamom • Pergamum • sesamum
•per annum • magnum • damnum
•Arnhem, Barnum
•envenom, venom
•interregnum • Cheltenham • arcanum
•duodenum, plenum
•platinum • antirrhinum • Bonham
•summum bonum • Puttnam
•ladanum • molybdenum • laudanum
•origanum, polygonum
•organum • tympanum
•laburnum, sternum
•gingham • Gillingham • Birmingham
•Cunningham • Walsingham
•Nottingham • wampum • carom
•Abram • panjandrum • tantrum
•angstrom • alarum • candelabrum
•plectrum, spectrum
•arum, harem, harum-scarum, Sarum
•sacrum, simulacrum
•maelstrom • cerebrum • pyrethrum
•Ingram
•sistrum, Tristram
•Hiram
•grogram, pogrom
•nostrum, rostrum
•cockalorum, decorum, forum, jorum, Karakoram, Karakorum, Mizoram, pons asinorum, quorum
•wolfram • fulcrum • Durham
•conundrum • buckram • lustrum
•serum, theorem
•labarum • marjoram • pittosporum
•Rotherham • Bertram
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"duodenum." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "duodenum." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O233-duodenum.html "duodenum." Oxford Dictionary of Rhymes. 2007. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-duodenum.html |
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