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Definitions of blastula
  1. noun
    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

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Definition that contains blastula
  • blastular of or relating to a blastula
  • blastocele the fluid-filled cavity inside a blastula
  • blastoderm a layer of cells on the inside of the blastula
  • gastrulation the process in which a gastrula develops from a blastula by the inward migration of cells
  • blastodermic vessicle the blastula of a placental mammal in which some differentiation of cells has occurred
  • germinal area a layer of cells on the inside of the blastula
  • blastocyst the blastula of a placental mammal in which some differentiation of cells has occurred
  • gastrula double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm
  • blastocoel the fluid-filled cavity inside a blastula
  • blastospheric of or relating to a blastula
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