Blastula

Blastula

Infobox Embryology
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Caption = Blastulation. 1 - morula, 2 - blastula.


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The blastula is an early stage of embryonic development in animals. It is also called blastosphere. It is produced by cleavage of a fertilized ovum and consists of a spherical layer of around 128 cells surrounding a central fluid-filled cavity called the blastocoel. The blastula follows the morula and precedes the gastrula in the developmental sequence.

Research

A whitefish blastula is often used to help study the processes of mitosis in animal cells. [cite web |url=http://biology.northwestcollege.edu/biology/b1010lab/mitwfish.htm |title=Whitefish Mitosis |accessdate=2007-10-11 |format= |work=] The blastula is prevented from multiplying during the nuclear-injection stage.

Blastula and blastocyst

In mammals, blastulation leads to the formation of the blastocyst, which must not be confused with the blastula; even though they are similar in structure, their cells have different fates.

References


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Look at other dictionaries:

  • 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 animal après le stade de la …   Encyclopédie Universelle

  • Blástula — Saltar a navegación, búsqueda La blástula es un estado temprano del desarrollo embrionario en los animales; en los mamíferos recibe el nombre de blastocito. La blástula sigue a la mórula y precede a la gástrula en la secuencia de desarrollo. Una… …   Wikipedia Español

  • blastulă — BLASTÚLĂ, blastule, s.f. Stadiu embrionar la metazoare, de formă globulară, cu celulele dispuse într un singur strat şi cu o cavitate în interior. – Din fr. blastule. Trimis de paula, 13.09.2007. Sursa: DEX 98  blastúlă s. f., g. d. art.… …   Dicționar Român

  • blástula — f. embriol. Fase del desarrollo embrionario animal anterior a la gástrula y posterior a la mórula. En esta fase la mórula se cavita y aparece el blastocele, una cavidad interna rodeada por una única capa de células. También se denomina… …   Diccionario médico

  • blastula — blȁstula ž DEFINICIJA zool. rani oblik brazdanja jajeta mnogih mnogostaničnih životinja ETIMOLOGIJA nlat. blastula: mala klica ← grč. blastós: klica, zametak …   Hrvatski jezični portal

  • 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 — 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.

  • Blastŭla — (einschichtige Keimblase), s. Entwickelungsgeschichte …   Meyers Großes Konversations-Lexikon

  • Blastula — Blastūla, s. Gastrula …   Kleines Konversations-Lexikon

  • Blastula — Blastula, Embryonalstadium der Metazoen; entsteht bei der ⇒ Furchung aus der ⇒ Morula. Die Blastomeren formieren sich zu einer Hohlkugel, indem sie als Blastoderm wandartig einen Hohlraum, die primäre Leibeshöhle (Blastocoel), umschließen. Fehlt… …   Deutsch wörterbuch der biologie

  • blastula — embryonic state, 1875, Modern Latin, from Gk. blastos sprout, germ + dim. ending ULA (Cf. ula) …   Etymology dictionary

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