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Epiblast |
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epiblast [′ep·ə‚blast]
(embryology) Epiblast (1) In botany, a squamous growth on the outer side of the embryo of many herbs. The epiblast covers the plumule partially or completely. It is well expressed in most bread grains and meadow grasses, for example, rice, Poa, barley, and bamboo. It is absent in millet, sorghum, corn, and canes. The epiblast protects the plumule. During germination it swells greatly, accumulating moisture like a sponge and participating in dehiscence of the caryopsis. The morphological nature of the epiblast is unclear. (2) In zoology, the outer epithelial layer of the discoblastula, or blastoderm, in scorpions, cephalopods, mollusks, sharks, and bony fishes, as well as in most reptiles, birds, and lower mammals. The epiblast contains ectodermal and mesodermal material. It is isolated from the cells of the internal layer, or hypoblast, by a cavity known as the blastocoel. 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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No references found | Those who had taken their question to the mufti had to tell him that the embryonic stem cell lines (ES cell lines) are cultures of cells derived from the epiblast tissue of the inner cell mass (ICM) of a blastocyst--an early stage embryo--approximately four to five days old in humans and consisting of 50 to 150 cells. The epiblast stem cells were hailed last night as "the missing link" that could lead to cures for diseases such as cystic fibrosis. Multiple Agilent Microarray Genomic Platforms, Online Design Tool Used to Examine Mouse Epiblast Cells and Human Embryonic Stem Cells for Similarities, Differences SANTA CLARA, Calif. |
Epiblast |
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