What is "blastocoel"

blastocoel \blastocoel\, Blastocoele \Blas"to*c[oe]le\ blastocoele \blastocoele\, n. [Gr. blasto`s sprout + koi^los hollow.] (Biol.) The cavity inside a blastula; -- also called segmentation cavity.

n. (alternative spelling of blastocoele English)

n. the fluid-filled cavity inside a blastula [syn: blastocoele, blastocele, segmentation cavity, cleavage cavity]

A blastocoel is a fluid-filled cavity that forms in the animal hemisphere of early amphibian and echinoderm embryos, or between the epiblast and hypoblast of avian, reptilian, and mammalian blastoderm-stage embryos.

A blastocoel (alt. spelling blastocoele, blastocele) is also termed the blastocyst cavity (or cleavage or segmentation cavity) is the name given to the fluid-filled cavity of the blastula ( blastocyst) that 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