page_title: Blastocoel
hierarchical_section_title: Blastocoel
context_page_description: A blastocoel, also spelled blastocoele and blastocele, and also called blastocyst cavity is a fluid-filled cavity that forms in the blastula of early amphibian and echinoderm embryos, or between the epiblast and hypoblast of avian, reptilian, and mammalian blastoderm-stage embryos.
  It results from cleavage of the oocyte after fertilization. It forms during embryogenesis, as what has been termed a "Third Stage" after the single-celled fertilized oocyte has divided into 16-32 cells, via the process of mitosis. It can be described as the first cell cavity formed as the embryo enlarges, the essential precursor for the differentiated, topologically distinct, gastrula.
context_section_description: A blastocoel (/ˈblæstəˌsiːl/), also spelled blastocoele and blastocele, and also called blastocyst cavity (or cleavage or segmentation cavity) is a fluid-filled cavity that forms in the blastula (blastocyst) of early amphibian and echinoderm embryos, or between the epiblast and hypoblast of avian, reptilian, and mammalian blastoderm-stage embryos.
  It results from cleavage of  the oocyte (ovum) after fertilization. It forms during embryogenesis, as what has been termed a "Third Stage" after the single-celled fertilized oocyte (zygote, ovum) has divided into 16-32 cells, via the process of mitosis. It can be described as the first cell cavity formed as the embryo enlarges, the essential precursor for the differentiated, topologically distinct, gastrula.
caption: Mammalian blastocoel[1]
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