blastema

blastema
1. The primordial cellular mass (precursor) from which an organ or part is formed. 2. A cluster of cells competent to initiate the regeneration of a damaged or ablated structure. [G. a sprout]
- metanephric b. SYN: metanephric cap.
- nephric b. the extension of nephrogenic cord tissue, caudal to the mesonephros, into which the ureteric buds grow to initiate development of the definitive mammalian kidney. SYN: nephroblastema.

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blas·te·ma bla-'stē-mə n, pl -mas also -ma·ta -mət-ə a mass of living substance capable of growth and differentiation
blas·te·mat·ic .blas-tə-'mat-ik or blas·te·mic bla-'stē-mik, -'stem-ik adj

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n.
any zone of embryonic tissue that is still differentiating and growing into a particular organ. The term is usually applied to the tissue that develops into the kidneys and gonads.

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blas·te·ma (blas-teґmə) [Gr. blastēma shoot] 1. in species with asexual reproduction, a group of cells that give rise to a new individual. 2. in other species, a group of cells with little or no differentiation that gives rise to an organ or part in either normal development or regeneration. blastemic adj

Medical dictionary. 2011.

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Look at other dictionaries:

  • blastemă — blastémă s. f., pl. blastéme Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  BLASTÉMĂ s.f. (bot.) 1. Mugure din care se va regenera un organ oarecare. 2. Talul unui lichen. [< fr. blastème, cf. gr. blastema – mugure] …   Dicționar Român

  • blastema — m. embriol. Masa de tejido embrionario formado por células indiferenciadas que dará lugar a un órgano determinado. Medical Dictionary. 2011. blastema …   Diccionario médico

  • blastema — (del gr. «blástēma») m. Biol. Conjunto de *células embrionarias que, mediante su proliferación, llegan a constituir cada uno de los tejidos orgánicos diferenciados. * * * blastema. (Del gr. βλάστημα, germen, retoño). m. Biol. Conjunto de células… …   Enciclopedia Universal

  • blastema — 1849, Modern Latin, from Gk. blastema offspring, offshoot, from stem of blastanein to shoot forth, from blastos sprout, germ, of unknown origin. Related: Blastemal …   Etymology dictionary

  • blastema — [blas tē′mə] n. pl. blastemas or blastemata [blas təmə tə] [ModL < Gr blastēma, a bud < blastanein, to bud < blastos, a sprout] the undifferentiated embryonic tissue from which cells, tissues, and organs are developed blastemic… …   English World dictionary

  • Blastema — Blas*te ma, n.; pl. {Blastemata}. [Gr. bla sthma bud, sprout.] (Biol.) The structureless, protoplasmic tissue of the embryo; the primitive basis of an organ yet unformed, from which it grows. [1913 Webster] …   The Collaborative International Dictionary of English

  • blastema — blastema. См. бластема. (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.

  • Blastēma — (gr, Keim, Sproß), 1) (Bot.), nach Richard die Keimpflanze, d.h. das Pflänzchen des Keimes für sich ohne Samenlappen; nach Wallroth das Lager der Flechten, also so v.w. Thallus; daher Blastematicus (Thallodes), zum Lager gehörend od. von ihm… …   Pierer's Universal-Lexikon

  • Blastema — Blastema, physiologischer Name derjenigen Theile der Thier und Pflanzensäfte, welche dem organischen Gewebe die zum Wachsthum nöthigen Stoffe liefern …   Herders Conversations-Lexikon

  • blastema — |ê| s. m. 1. Invólucro membranoso do embrião. 2. Eixo do desenvolvimento do embrião vegetal. 3. Substâncias amorfas que se derramam dentro ou à superfície de um tecido …   Dicionário da Língua Portuguesa

  • blastema — (Del gr. βλάστημα, germen, retoño). m. Biol. Conjunto de células embrionarias cuya proliferación conduce a la formación de un órgano determinado …   Diccionario de la lengua española

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