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epiblast |
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epiblast /epi·blast/ (ep´ĭ-blast)
1. the upper layer of the bilaminar embryonic disc present during the second week; it gives rise to ectoderm. 2. ectoderm. 3. ectoderm, except for the neural plate.epiblas´tic
epiblast [ep′iblast′] Etymology: Gk, epi, upon, blastos, germ the primordial outer layer of the blastocyst or blastula, before differentiation of the germ layers, that gives rise to the ectoderm and contains cells capable of forming the endoderm and mesoderm. See also ectoderm. epiblastic, adj. epiblast layer of cells roofing over the blastocoel in the avian embryo. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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