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blastula    
n. 胞胚

胞胚

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}]


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  • 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 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)
  • 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 AND TYPES OF BLASTULA - ZOOLOGYTALKS | 19 11 2025
    The classic blastula, also known as the hollow or spherical blastula, is the archetypal form observed in many animals, including vertebrates and invertebrates It consists of a single layer of cells surrounding a fluid-filled cavity known as 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
  • Cleavage - The Blastula
    The blastula is a hollow ball of cells organized into an epithelial monolayer Midway through the blastula stage, the embryo secretes hatching enzyme, which results in proteolytic degradation of the fertilization envelope
  • Difference Between Morula and Blastula | Definition, Structure . . .
    Blastula is a hollow ball of cells of an animal embryo in its early stages of development Once morula consists of about hundreds of cells produced by cleavage, it develops into the blastula
  • Blastula: Formation, Structure Function in Embryonic Development
    A blastula is an early-stage embryo typically consisting of a hollow sphere of cells, called blastomeres, that surround a fluid-filled cavity known as the blastocoel
  • Blastula | definition of blastula by Medical dictionary
    blastula A hollow sphere formed during the early embryonic development of higher animals—which follows the morular stage of embryogenesis—in which dividing cells line up on the outside and are bathed by fluid within the adjacent cavity (blastocoele)





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