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endoderm
endoderm , in biology, inner layer of tissue formed in the gastrula stage of the developing embryo. At the end of the blastula stage, cells of the embryo are arranged in the form of a hollow ball. Cell movement results in an invagination of the bottom region, or vegetal hemisphere, of the embryo so that it resembles a double-walled cup. The inner layer of the cup is the endoderm; the outer layer is the ectoderm ; a middle layer, the mesoderm , forms from a marginal zone. The endoderm is the germ layer from which are formed the digestive system, many glands, and part of the respiratory system. See embryo . |
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"endoderm." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "endoderm." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1E1-endoderm.html "endoderm." The Columbia Encyclopedia, 6th ed.. 2008. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-endoderm.html |
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endoderm
en·do·derm / ˈendəˌdərm/ (also en·to·derm) • n. Zoology & Embryology the innermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the lining of the gut and associated structures. Compare with ectoderm and mesoderm. DERIVATIVES: en·do·der·mal adj. en·do·der·mic adj. |
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"endoderm." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "endoderm." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O999-endoderm.html "endoderm." The Oxford Pocket Dictionary of Current English. 2009. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-endoderm.html |
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endoderm
endoderm (end-oh-derm) n. the inner of the three germ layers of the early embryo, which gives rise to the lining of most of the alimentary canal and its associated glands, the lining of the bronchi and alveoli of the lung, and most of the urinary tract.
—endodermal (en-doh-der-măl) adj. |
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"endoderm." A Dictionary of Nursing. 2008. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "endoderm." A Dictionary of Nursing. 2008. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O62-endoderm.html "endoderm." A Dictionary of Nursing. 2008. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-endoderm.html |
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endoderm
endoderm (entoderm) The internal layer of cells of the gastrula, which will develop into the alimentary canal (gut) and digestive glands of the adult. See also germ layers.
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"endoderm." A Dictionary of Biology. 2004. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "endoderm." A Dictionary of Biology. 2004. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O6-endoderm.html "endoderm." A Dictionary of Biology. 2004. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-endoderm.html |
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endoderm
endoderm In an embryo, the innermost layer of cells that gives rise to the lining of the archenteron (digestive cavity) and its associated glands. See also GASTRULATION.
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MICHAEL ALLABY. "endoderm." A Dictionary of Zoology. 1999. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "endoderm." A Dictionary of Zoology. 1999. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O8-endoderm.html MICHAEL ALLABY. "endoderm." A Dictionary of Zoology. 1999. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-endoderm.html |
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