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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, 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)
  • 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 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
  • 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)
  • 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
  • What is the Difference Between Blastula and Blastocyst
    Blastula refers to an animal embryo at the early stage of development when it is a hollow ball of cells whereas blastocyst refers to mammalian blastula in which some differentiation of cells has occurred
  • Blastulation: Definition, Types and Process of Bastulation in egg
    Though mammalian egg has no yolk, they form a discoidal blastula The inner cell mass spreads inside the cavity as a flat disc, resembling the chick blastoderm This stage of mammalian development is known as the blastocyst, and it is at this stage that the embryo implants into the uterine wall
  • 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





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