blastema


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.

blas·te·ma

 (blă-stē′mə)
n. pl. blas·te·mas or blas·te·ma·ta (-mə-tə)
1. A mass of undifferentiated cells from which an organ or a body part develops, either in normal development or in the regeneration of a lost body part.
2. A structureless substance from which it was formerly believed that cells are formed.

[Greek blastēma, offspring, sprout, from blastos, bud.]

blas·te′mal, blas′te·mat′ic (blăs′tə-măt′ĭk), blas·te′mic (blă-stē′mĭk) adj.

blastema

(blæˈstiːmə)
n, pl -mas or -mata (-mətə)
(Physiology) a mass of undifferentiated animal cells that will develop into an organ or tissue: present at the site of regeneration of a lost part
[C19: from New Latin, from Greek: offspring, from blastos bud]
blastemic adj

blas•te•ma

(blæˈsti mə)

n., pl. -mas, -ma•ta (-mə tə)
an aggregation of cells in an early embryo capable of differentiation into specialized tissue and organs.
[1840–50; < New Latin < Greek blástēma (blastē- variant s. of blasteîn to sprout + -ma n. suffix of result)]
blas•te′mal, blas•te•mat•ic (ˌblæs təˈmæt ɪk) blas•te′mic (-ˈsti mɪk, -ˈstɛm ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.blastema - a mass of undifferentiated cells from which an organ or body part develops
cell - (biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
Translations

blas·te·ma

n. blastema, sustancia primaria de la cual se originan las células.
References in periodicals archive ?
El testiculo fetal se constituye mediante cuatro poblaciones celulares de distinto origen: celulas germinales primordiales, celulas del epitelio celomico, celulas provenientes de los conductos mesonefricos y celulas mesenquimales del blastema gonadal (Rojas & Prieto, 2014).
MRKH syndrome has been attributed to an initial affection of the intermediate mesoderm, consequently leading to an alteration of the blastema of the cervicothoracic somites and pronephric ducts (4,12).
The inadequate stimulation of metanephrogenic blastema by the ureteric bud results in renal maldevelopment.
Wilms' tumour also called as nephroblastoma is a malignant renal neoplasm of childhood that arises from remnant of immature kidney that is from abnormal proliferation of metanephric blastema without differentiation into glomeruli and tubules.
A German pathologist Johannes Muller first time demonstrated that cancer cells were originated from a bud called Blastema instead of normal cells (Kardinal and Yarbro, 1979).
Unlike urodele limb regeneration, antler regeneration does not involve cell de-differentiation and the formation of a blastema from the de-differentiated cells; rather, antler regeneration appears to a stem-cell-based process that requires the periodic activation of periosteal stem cells of the distal pedicle, which are presumably derived from the neural-crest (Kierdorf et al.
This is thought to result from the abnormal development and migration of the ureteric bud and metanephric blastema during the fourth week to eighth week of gestation.
The blastema area stained positive for vimentin, CD99 and CD117, but negative for CK, RCC, CD10, CK7, EMA, CgA, Syn, CD34, WT-1, myogenin and myoD1.
However, in the group treated with dexamethasone, the blastema developed less and the cells of the epithelium basal layer were not yet cylindrical, which is an essential characteristic for the synthesis of the basal membrane (Figures 4 and 5).
The other pathologic findings include metaplastic cartilage, bone, basement membrane thickening of the primitive ducts, nodular renal blastema, and proliferating nerves.
When the limb of an axolotl is severed, a collection of stem cells known as a blastema forms.