How is the blastocoele of a protostome similar to a deuterostome?

Answer 1

In both protostomes and deuterostomes, the blastocoele serves as a central cavity within the early embryonic structure, facilitating the organization of cells during development. While the specific developmental pathways differ—protostomes typically undergo spiral cleavage and form the mouth first, whereas deuterostomes exhibit radial cleavage and develop the anus first—the blastocoele itself plays a crucial role in providing space for cell movement and differentiation in both groups. Thus, despite their differences in developmental processes, the blastocoele functions similarly in both protostome and deuterostome embryos.