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cloaca
cloaca , in biology, enlarged posterior end of the digestive tract of some animals. The cloaca, from the Latin word for sewer, is a single chamber into which pass solid and liquid waste materials as well as the products of the reproductive organs, the gametes. Cloacas are found in amphibians, reptiles, birds, and lower mammals; higher mammals have a separate rectal outlet, the anus. The term cloaca is also used for analogous chambers in many invertebrates, such as worms of the phylum Nematoda . |
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"cloaca." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "cloaca." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-cloaca.html "cloaca." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-cloaca.html |
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cloaca
clo·a·ca / klōˈākə/ • n. (pl. -cae / -ˌkē; -ˌsē/ ) Zool. a common cavity at the end of the digestive tract for the release of both excretory and genital products in vertebrates (except most mammals) and certain invertebrates. Specifically, the cloaca is present in birds, reptiles, amphibians, most fish, and monotremes. ∎ archaic a sewer. DERIVATIVES: clo·a·cal adj. |
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"cloaca." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "cloaca." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O999-cloaca.html "cloaca." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-cloaca.html |
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cloaca
cloaca sewer XVIII; (anat.) excretory canal XIX. — L. cloāca, cluāca, earlier clovāca, rel. to cluere cleanse, f. IE. *klu- *kleu- *klou-, repr. also by OE. hlūt(t)or pure, Gr. klúzein wash, bathe.
So cloacal XVII. |
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T. F. HOAD. "cloaca." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. T. F. HOAD. "cloaca." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O27-cloaca.html T. F. HOAD. "cloaca." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-cloaca.html |
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cloaca
cloaca The cavity in the pelvic region into which the terminal parts of the alimentary canal and the urinogenital ducts open in most vertebrates. Placental mammals, however, have a separate anus and urinogenital opening.
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"cloaca." A Dictionary of Biology. 2004. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "cloaca." A Dictionary of Biology. 2004. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O6-cloaca.html "cloaca." A Dictionary of Biology. 2004. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-cloaca.html |
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cloaca
cloaca In most vertebrates, including Monotremata but excluding other mammals, terminal part of the gut into which the alimentary, urinary, and reproductive systems open, leading to a single aperture in the body.
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MICHAEL ALLABY. "cloaca." A Dictionary of Zoology. 1999. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "cloaca." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O8-cloaca.html MICHAEL ALLABY. "cloaca." A Dictionary of Zoology. 1999. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-cloaca.html |
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cloaca
cloaca (kloh-ay-kă) n. the most posterior part of the embryonic hindgut. It becomes divided into the rectum and the urinogenital sinus.
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"cloaca." A Dictionary of Nursing. 2008. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "cloaca." A Dictionary of Nursing. 2008. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O62-cloaca.html "cloaca." A Dictionary of Nursing. 2008. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-cloaca.html |
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cloaca
cloaca Cavity into which intestinal, urinary, and genital tracts open in fish, reptiles, birds and some primitive mammals.
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"cloaca." World Encyclopedia. 2005. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "cloaca." World Encyclopedia. 2005. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O142-cloaca.html "cloaca." World Encyclopedia. 2005. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-cloaca.html |
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