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embryonic layer |
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embryonic layer, one of the three layers of cells in the embryo: the endoderm, the mesoderm, and the ectoderm. From these layers of cells arise all of the structures and organs and parts of the body. The endoderm and the ectoderm are the first to develop. During the third week of gestation the mesoderm arises between the ectoderm and the endoderm. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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