blastula


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to blastula: gastrulation, archenteron

blas·tu·la

 (blăs′chə-lə)
n. pl. blas·tu·las or blas·tu·lae (-lē′)
An early embryonic form produced by cleavage of a fertilized ovum and consisting of a spherical layer of cells surrounding a fluid-filled cavity. Also called blastosphere.

[New Latin : from Greek blastos, bud + Latin -ula, feminine diminutive suff.]

blas′tu·lar adj.
blas′tu·la′tion (-lā′shən) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

blastula

(ˈblæstjʊlə)
n, pl -las or -lae (-liː)
(Biology) an early form of an animal embryo that develops from a morula, consisting of a sphere of cells with a central cavity. Also called: blastosphere
[C19: New Latin; see blasto-]
ˈblastular adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

blas•tu•la

(ˈblæs tʃə lə)

n., pl. -las, -lae (-ˌli)
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. Compare blastocyst.
[1885–90; < Greek blast(ós) bud, sprout + New Latin -ula -ule]
blas′tu•lar, adj.
blas`tu•la′tion (-ˈleɪ ʃən) n.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

blas·tu·la

(blăs′chə-lə)
Plural blastulas or blastulae (blăs′chə-lē′)
An embryo at the stage immediately following the division of the fertilized egg cell, consisting of a ball-shaped layer of cells around a fluid-filled cavity. Compare gastrula.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.blastula - early stage of an embryo produced by cleavage of an ovumblastula - early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
conceptus, fertilized egg, embryo - an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
blastocele, blastocoel, blastocoele, cleavage cavity, segmentation cavity - the fluid-filled cavity inside a blastula
blastocyst, blastodermic vessicle - the blastula of a placental mammal in which some differentiation of cells has occurred
trophoblast - the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall; "after implantation of the blastocyst in the uterine wall the trophoblast divides into two layers, the chorion and the placenta"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

blas·tu·la

n. blástula, etapa primitiva del óvulo.
English-Spanish Medical Dictionary © Farlex 2012
References in periodicals archive ?
However, as of 2019, we will highlight our efforts to extract cell samples from fertilized blastula eggs from cattle, then recover DNA from 7-10 cells and purify and amplify this so that the material can be used for ordinary genetic tests and genomic selection.
Un cuerpo que se va formando desde su etapa primigenia de cigoto, pasando a huevo, morula, blastula, glastula, preembrion, embrion, feto y nacido, siendo estos estos dos ultimos los que cuentan con forma y apariencia humana.
In about 1km walk along the trail, we found two clutches of varying stages laid in inclined Pandanus leaf axils, one newly laid (about blastula stage, with 8 embryos) and another clutch with four embryos having well-developed abdominal sacs.
To examine the development of the nervous system, we collected samples at the following stages: blastula (16 hpf): early, middle, and late trochophore (18 and 22 hpf, 28 hpf, and 32-36 hpf.
Thirteen carp tissues (heart, liver, kidney, hindbrain, spleen, foregut, hindgut, muscle, gill, eye, scale, fin and gonad) were collected from six 2-year-old healthy adults (three females and three males), and five critical periods of embryonic development (blastula, gastrula, neurula, tail-bud and hatching) were obtained from embryos.
This was followed by development of the blastula >64-cell phase at 3 hpf (Fig.
Continuous cleavage led to a blastula at 280 minutes after fertilisation (Fig.
After fertilization process the eggs develop into 2-cell, 4-cell, 8-cell, 16-cell stages and so on until a blastula stage (128-cell stage) is formed (Sewel and Young, 1999).
Stem cells come from a human blastula, the cluster of cells that grows from a fertilized egg.
Compared with the PBS and blank control groups, the percentages of 6- to 8-cell stage embryos on the third day, as well as blastula and morula stage embryos on the fifth day, were significantly lower in the antibody group.
Although embryonic clocks are differentially regulated from those in the adult organism [64], photic signals and, consequently, an active phototransduction system, during blastula to early segmentation stages, are indispensable to maturation of a functional circadian clock [40].