Blastula formation marks the embryo’s transition from cleavage to organised structure. This stage produces the blastocoel, establishes early polarity, and prepares the embryo for gastrulation.
Gastrulation is the process that forms the three germ layers and establishes the body plan. It reshapes the blastula through coordinated cell movements and molecular signalling.
Meroblastic cleavage is a partial embryonic division restricted to the blastodisc of yolk‑rich eggs. It produces a blastoderm that sits atop the yolk and establishes early developmental polarity.
Blastula formation marks the embryo’s transition from cleavage to organised structure. This stage produces the blastocoel, establishes early polarity, and prepares the embryo for gastrulation.
Gastrulation is the process that forms the three germ layers and establishes the body plan. It reshapes the blastula through coordinated cell movements and molecular signalling.
Meroblastic cleavage is a partial embryonic division restricted to the blastodisc of yolk‑rich eggs. It produces a blastoderm that sits atop the yolk and establishes early developmental polarity.
