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dc.contributor.editorMoeller, Karlaen_US
dc.creatorMacCord, Kateen_US
dc.date.accessioned2013-10-03T23:05:47Z
dc.date.available2013-10-03T23:05:47Z
dc.date.created2013-09-17en_US
dc.date.issued2013-10-03
dc.identifier.urihttp://hdl.handle.net/10776/6273
dc.description.abstractA germ layer is a group of cells in an embryo that interact with each other as the embryo develops and contribute to the formation of all organs and tissues. All animals, except perhaps sponges, form two or three germ layers. The germ layers develop early in embryonic life, through the process of gastrulation. During gastrulation, a hollow cluster of cells called a blastula reorganizes into two primary germ layers: an inner layer, called endoderm, and an outer layer, called ectoderm. Diploblastic organisms have only the two primary germ layers; these organisms characteristically have multiple symmetrical body axes (radial symmetry), as is true of jellyfish, sea anemones, and the rest of the phylum Cnidaria. All other animals are triploblastic, as endoderm and ectoderm interact to produce a third germ layer, called mesoderm. Together, the three germ layers will give rise to every organ in the body, from skin and hair to the digestive tract.en_US
dc.format.mediumtext/xhtmlen_US
dc.language.isoengen_US
dc.publisherArizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia.en_US
dc.relation.ispartofEmbryo Project Encyclopediaen_US
dc.rightsCopyright Arizona Board of Regentsen_US
dc.subjectConcepten_US
dc.subject.lcshGastrulationen_US
dc.subject.lcshEmbryologyen_US
dc.subject.lcshCell differentiationen_US
dc.subject.lcshEmbryos
dc.subject.lcshcells
dc.subject.lcshTissues
dc.subject.lcshAnatomy
dc.subject.lcshVertebrates
dc.subject.lcshinvertebrates
dc.subject.lcshEmbryological development
dc.subject.lcshOrgans
dc.subject.lcshOrgans (Anatomy)
dc.subject.lcshBlastula
dc.subject.lcshCentral nervous system
dc.subject.lcshPander, Christian Heinrich, 1794-1865
dc.subject.lcshRathke, Heinrich, 1793-1860
dc.subject.lcshBaer, Karl Ernst von, 1792-1876
dc.subject.lcshHuxley, Thomas Henry, 1825-1895
dc.subject.lcshLankester, E. Ray (Edwin Ray), Sir, 1847-1929
dc.subject.lcshHaeckel, Ernst, 1834-1919
dc.subject.lcshHis, Wilhelm, 1831-1904
dc.subject.lcshSpemann, Hans, 1869-1941
dc.subject.lcshNieuwkoop, Pieter D. (Pieter Dirk)
dc.subject.meshGerm Layersen_US
dc.titleGerm Layersen_US
dc.typeTexten_US
dc.rights.licenseLicensed as Creative Commons Attribution-NonCommercial-Share Alike 3.0 Unported (CC BY-NC-SA 3.0) http://creativecommons.org/licenses/by-nc-sa/3.0/en_US
dc.subject.embryoTheoriesen_US
dc.subject.embryoProcessesen_US
dc.subject.tagGerm layer theoryen_US
dc.subject.tagmesoderm
dc.subject.tagendoderm
dc.subject.tagectoderm
dc.description.typeArticlesen_US


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