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blastoderm

n. 胚盘

胚盘

WordNet (r) 3.0 (2006) (WordNet)

blastoderm
n 1: a layer of cells on the inside of the blastula [synonym:
{blastoderm}, {germinal disc}, {blastodisc}, {germinal
area}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Blastoderm \Blas"to*derm\, n. [Gr. blasto`s sprout E. derm.]
(Embryology)
the early stage of an embryo after the first cleavages of the
ovum; also, the layer of cells of which the early embryo is
composed; specifically:
(a) the early embryo developing from a blastodisc, after the
blastocoel has formed.
(b) in an insect embryo, the layer of cells that surrounds
the internal mass of the yolk.
[PJC] Blastodermatic

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英文字典中文字典相关资料:

Blastoderm - Wikipedia
The blastoderm forms a thin layer of cells that lies on top of the yolk or along the inner surface of the egg membrane, depending on the species In birds, this sheet separates into 2 regions: the area pellucida and the area opaca surrounding it
Blastoderm | biological membrane | Britannica
…epithelial (covering) layer, called the blastoderm, enclosing a fluid-filled cavity, the blastocoel After the blastula develops, it undergoes transition to the gastrula (q v ), a process called gastrulation
BLASTODERM Definition Meaning - Merriam-Webster
blastoderm noun blas· to· derm ˈbla-stə-ˌdərm : a blastodisc after completion of cleavage and formation of the blastocoel
Blastoderm | definition of blastoderm by Medical dictionary
blastoderm the layer of cells formed by cleavage of the fertilized egg in the presence of large amounts of yolk, e g in birds, so that the blastoderm forms on one side of the yolk mass, initially as a small blastodisc
Blastoderm Definition Meaning | YourDictionary
Blastoderm definition: The part of a fertilized ovum that gives rise to the germinal disk from which the embryo develops
Blastoderm - an overview | ScienceDirect Topics
Blastoderm is defined as the first epithelium that develops in the Drosophila embryo, consisting of a single-layered epithelium of approximately 5000 cells formed by membrane projections between individual nuclei in the syncytial blastoderm
43. 5B: Cleavage, the Blastula Stage, and Gastrulation
After the cleavage has produced over 100 cells, the embryo is called a blastula The blastula is usually a spherical layer of cells (the blastoderm) surrounding a fluid-filled or yolk-filled cavity (the blastocoel)
Blastulation - Wikipedia
Blastulation is the stage in early animal embryonic development that produces the blastula In mammalian development, the blastula develops into the blastocyst with a differentiated inner cell mass and an outer trophectoderm
Blastula | Embryonic Development, Cell Division . . .
blastula, hollow sphere of cells, or blastomeres, produced during the development of an embryo by repeated cleavage of a fertilized egg The cells of the blastula form an epithelial (covering) layer, called the blastoderm, enclosing a fluid-filled cavity, the blastocoel
What is blastoderm in biology? - wellpath
The blastoderm is a crucial embryonic stage forming a layer of cells after rapid cell divisions (cleavage) in the early embryo It is primarily associated with meroblastic cleavage in yolky eggs (e g , birds, fish) but also broadly refers to the initial cellular layer in other species

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