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blastula

Translation
blastula
—blastular, adj. —blastulation /blas'cheuh lay"sheuhn/, n.
/blas"cheuh leuh/, n., pl. blastulas, blastulae /-lee'/. Embryol.
the early developmental stage of an animal, following the morula stage and consisting of a single, spherical layer of cells enclosing a hollow, central cavity. Cf. blastocyst.
[1885-90; < NL < Gk blast(ós) bud, sprout + NL -ula -ULE]

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      hollow sphere of cells, or blastomeres, produced during the development of an embryo by repeated cleavage of a fertilized egg. The cells of the blastula form an epithelial (covering) layer, called the blastoderm, enclosing a fluid-filled cavity, the blastocoel. After the blastula develops, it undergoes transition to the gastrula (q.v.), a process called gastrulation. In organisms such as mammals, the earlier morula (q.v.), a berrylike cluster of cells, develops into a somewhat different form of blastula, the blastocyst (q.v.).

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Universalium. 2010.

  
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  • blastula — * * * blastula [ blastyla ] n. f. • 1896; du gr. blastos « germe » ♦ Biol. Stade du développement embryonnaire* caractérisé par la formation d une cavité au sein des blastomères*. * * * ● blastula nom féminin Forme prise par le jeune embryon… …   Encyclopédie Universelle

  • Blastula — Blas tu*la, n. [NL., dim. of Gr. blasto s a sprout.] (Biol.) That stage in the development of the ovum in which the outer cells of the morula become more defined and form the blastoderm. [1913 Webster] …   The Collaborative International Dictionary of English

  • blastula — 1> биол. бластула (стадия развития зародыша) …   Новый большой англо-русский словарь

  • blastula — blastula. См. бластула. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Blastula — 1 Morula, 2 Blastula Die Blastula (von griechisch Blastos: der Keim, die Knospe, der Spross) ist ein frühes Embryonalstadium Vielzelliger Tiere, das auf das Morula Stadium folgt und die Furchung abschließt. Im engeren Sinne wird als Blastula nur… …   Deutsch Wikipedia

  • Blastula — Infobox Embryology Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Blastulation. 1 morula, 2 blastula. Caption2 = System = CarnegieStage = Days = 4 Precursor = GivesRiseTo = MeshName = MeshNumber = DorlandsPre = b 14 DorlandsSuf =… …   Wikipedia

  • Blastula — Blastocyste Blastulation. 1 morula, 2 blastula …   Wikipédia en Français

  • blastula — биол. бластула (стадия развития зародыша) (биология) бластула (стадия развития зародыша) …   Большой англо-русский и русско-английский словарь

  • blastula — noun (plural las or blastulae) Etymology: New Latin, from Greek blastos bud more at blast Date: 1879 an early metazoan embryo typically having the form of a hollow fluid filled rounded cavity bounded by a single layer of cells compare gastrula,… …   New Collegiate Dictionary

  • Blastula — f = биол. бластула …   Большой немецко-русский и русско-немецкий словарь