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blastula

n. 胞胚

胞胚

WordNet (r) 3.0 (2006) (WordNet)

blastula
n 1: 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 [synonym: {blastula}, {blastosphere}]

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

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]

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英文字典中文字典相关资料:

Blastulation - Wikipedia
Blastulation is the stage in early animal embryonic development that produces the blastula In mammalian development, a 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 the Blastula? Definition, Structure Types . . .
In most animals, the blastula consists of an outer layer of cells surrounding a fluid-filled cavity After a sperm fertilizes an egg, the resulting single cell (the zygote) begins dividing rapidly in a process called cleavage These divisions don’t involve growth
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)
Cleavage and Blastula Stage | Biology for Majors II
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)
15. 4 | Early Embryonic Development – Human Biology
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)
Blastula - an overview | ScienceDirect Topics
The blastula is the first identifiable stage of early embryo development that is common to many animals, and consists generally of a hollow epithelial layer enclosing a fluid-filled cavity: the blastocoel

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