A blastocoel(e) or blastocele or cleavage cavity or segmentation cavity is the central region of a blastocyst. It is filled with fluid. A blastocoele forms during embryogenesis when a zygote (a fertilized ovum) divides into many cells through mitosis. The adjectival of "blastocoel(e)" is blastocoelic. Image File history File links Blastocyst. ... Image File history File links Blastocyst. ... The blastocyst is the structure formed in early mammalian embryogenesis, after the formation of the blastocele, but before implantation. ... A subset of the phases of matter, fluids include liquids, gases, plasmas and, to some extent, plastic solids. ... Embryogenesis is the process by which the embryo is formed and develops. ... This article or section does not cite its references or sources. ... A human ovum Sperm cells attempting to fertilize an ovum An ovum (plural ova) is a haploid female reproductive cell or gamete. ... A cell in early anaphase Mitosis is the process by which a cell separates its duplicated genome into two identical halves. ... An adjective is a part of speech which modifies a noun, usually describing it or making its meaning more specific. ...
Karp and Solursh have hypothesized that secondary mesenchyme cells, which form the filopodia of the developing archenteron (primary gut) require sulfate (to form sulfated proteoglycans which act as something like an adhesive) in order to migrate along the acid mucopolysaccharide of the extracellular matrix within the blastocoel of a developing sea urchin (1974).
Developing sea urchin embryos were raised in either artificial sea water or sulfate-free sea water, fixed, and stained for alkaline phosphotase enzyme activity and with immunofluorescent antibodies to vegetal archenteron cells.
Note the secondary mesenchyme cells, in the form of a filopodia, attaching to the blastocoel wall to pull the archenteron up through the blastocoel to form the gut cavity.
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