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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 Gastrulation - Britannica
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
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)
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
Midblastula - Wikipedia
During this stage, the embryo is referred to as a blastula The series of changes to the blastula that characterize the midblastula transition include activation of zygotic gene transcription, slowing of the cell cycle, increased asynchrony in cell division, and an increase in cell motility
BLASTULA Definition Meaning - Merriam-Webster
The meaning of BLASTULA is an early metazoan embryo typically having the form of a hollow fluid-filled rounded cavity bounded by a single layer of cells
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
Blastula - Definition and Examples - Biology Online Dictionary
A blastula is an early embryonic stage in various animal species that forms via cell division and differentiation post-fertilization It has a hollow, spherical shape containing a fluid-filled cavity known as the blastocoel
What is Blastula ? - YouTube
In this video, we explain Blastula — an early stage of embryonic development in animals that forms after the fertilized egg divides multiple times
Cleavage and Blastula Stage | Biology for Majors II - Lumen Learning
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)

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