endodermal, endodermic, adj.
/en"deuh derrm'/, n.
1. Also called endoblast. Embryol. the innermost cell layer of the embryo in its gastrula stage.
2. Anat. the innermost body tissue that derives from this layer, as the gut lining. Also, entoderm.
[1825-35; < F endoderme; see ENDO-, -DERM]

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      the innermost of the three germ layers, or masses of cells (lying within ectoderm and mesoderm), which appears early in the development of an animal embryo. The endoderm subsequently gives rise to the epithelium (tissue that covers, or lines, a structure) of the pharynx, including the eustachian tube, the tonsils, the thyroid gland, parathyroid glands, and thymus gland; the larynx, trachea, and lungs; the gastrointestinal tract (except mouth and anus), the urinary bladder, the vagina (in females), and the urethra. The term endoderm is sometimes used to refer to the gastrodermis, the simple tissue that lines the digestive cavity of cnidarians and ctenophores. Compare ectoderm; mesoderm.

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Universalium. 2010.

Look at other dictionaries:

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  • Endoderm — En do*derm, n. [Endo + Gr. ? skin.] (Biol.) (a) The inner layer of the skin or integument of an animal. (b) The innermost layer of the blastoderm and the structures derived from it; the hypoblast; the entoblast. See Illust. of {Ectoderm} …   The Collaborative International Dictionary of English

  • endoderm — 1835, from ENDO (Cf. endo ) + DERM (Cf. derm). Coined by Prussian embryologist Robert Remak (1815 1865) …   Etymology dictionary

  • endoderm — [en′dō dʉrm΄] n. [ ENDO + DERM] the inner layer of cells of the embryo, from which is formed the lining of the digestive tract, of other internal organs, and of certain glands endodermal adj. endodermic …   English World dictionary

  • endoderm — Hypoblast Hy po*blast, n. [Pref. hypo + blast.] (Biol.) The inner or lower layer of the blastoderm; called also {endoderm}, {entoderm}, and sometimes {hypoderm}. See Illust. of {Blastoderm}, {Delamination}, and {Ectoderm}. [1913 Webster] …   The Collaborative International Dictionary of English

  • endoderm — noun Etymology: French endoderme, from end + Greek derma skin more at derm Date: 1861 the innermost of the three primary germ layers of an embryo that is the source of the epithelium of the digestive tract and its derivatives and of the lower… …   New Collegiate Dictionary

  • Endoderm — Das Entoderm (von griech. to enteron „Darm“, eigentlich „das Innere“ und to derma „Haut“) ist das innere Keimblatt des Embryoblasten. Das Entoderm ist nicht zu verwechseln mit der Endodermis der Pflanzen. Aus dem Entoderm bilden sich die… …   Deutsch Wikipedia

  • endoderm — n. [Gr. endon, within; derma, skin] 1. The innermost cell layer of the embryo forming the epithelium of the archenteron, endoblast, entoderm, and hypoblast. 2. (CNIDARIA) Layer of cells lining the gastrovascular cavity. 3. (PORIFERA) see… …   Dictionary of invertebrate zoology

  • endoderm — A germ layer lying remote from the surface of the embryo that gives rise to internal tissues such as gut. Contrast mesoderm and ectoderm …   Dictionary of molecular biology

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