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Blastocoele
Blastocyst
Blastocyst with an inner cell mass and trophoblast.
Carnegie stage	3
Days	5
Precursor	morula
Gives rise to	primitive yolk sac

A blastocoel(e) or blastocele (also called blastocyst cavity,^[1] cleavage cavity or segmentation cavity) is the fluid-filled central region of a blastocyst. A blastocoele forms during embryogenesis when a zygote (a fertilized ovum) divides into many cells through mitosis.

The adjectival of "blastocoel(e)" is blastocoelic.

A blastocoel can be described as the first cell cavity formed as the embryo enlarges. It is essential for later gastrulation.

References

1. ^ "The Carnegie stages". Retrieved on 2007-10-13.

See also

• Embryo

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