What is the stage of embryo development that follows morulation? Describe the structure of the embryo during this next stage.
Blastulation is the stage of embryo development that follows morulation. The new cells created by ongoing cleavage begin secreting a fluid into the center of the mass of cells. The single layer of cells, called blastomeres, and the fluid-filled cavity the cells surround, called the blastocoel, together are known as the blastula.
