+The blastocoel is the fluid-filled cavity that forms within an early [blastula](/wiki/blastula) during animal [embryonic development](/wiki/embryonic_development). This critical space facilitates cell movement and rearrangement, preparing the way for tissue and organ formation.
+## See also
+- [Gastrulation](/wiki/gastrulation)
+- [Morula](/wiki/morula)
+- [Zygote](/wiki/zygote)
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