英语词汇“epiblast”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

　

单词	epiblast
释义	epiblast enUK ep·i·blast E0174300 (ĕp′ə-blăst′)n. The outer layer of a blastula that gives rise to the ectoderm after gastrulation. ep′i·blas′tic adj. epiblast (ˈɛpɪˌblæst) n (Physiology) embryol the outermost layer of an embryo, which becomes the ectoderm at gastrulation. Also called: ectoblast ˌepiˈblastic adj ep•i•blast (ˈɛp əˌblæst) n. the primordial outer layer of a young embryo. [1865–70] ep`i•blas′tic, adj. Epiblast enUK epiblast [′ep·ə‚blast] (embryology) ectoderm 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. epiblast enUK ep·i·blast (ep'i-blast), Gives rise to the ectoderm, mesoderm, and endoderm of the embryo proper. [epi- + G. blastos, germ] epiblast (ĕp′ə-blăst′)n. The outer layer of a blastula that gives rise to the ectoderm after gastrulation. ep′i·blas′tic adj. ep·i·blast (ep'i-blast) The component of the bilaminar embryonic disc that gives rise to ectoderm and mesoderm. The mesoderm then displaces the hypoblast cells and forms the entodermal cell layer on its inner surface. [epi- + G. blastos, germ] ThesaurusSeeectoblast
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更新时间：2025/1/9 7:10:47