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Blastula

Translation
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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  • 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 — 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 …   Universalium

  • Blastula — Blastocyste Cet article est une ébauche concernant la médecine. Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants …   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

  • blastula — f биол. бластула …   Большой французско-русский и русско-французский словарь