What occurs during the process of blastulation?

During the process of blastulation, the morula, which consists of a solid ball of cells formed after several divisions of the fertilized egg, develops a fluid-filled cavity known as the blastocoel. This transformation is significant as it marks the transition from a solid mass of cells to a structure that is more organized and ready for further development. The formation of the blastocoel creates a central cavity, allowing cells to migrate and rearrange, which sets the stage for subsequent processes such as gastrulation.

This developmental stage is crucial as it helps in establishing the future embryonic structures and their respective functions. Understanding that the blastocoel is central to this phase highlights the changes occurring as the embryo prepares for implantation and further development in the uterine environment.