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🥚 Gastrulation

Gastrulation transforms the blastula into a gastrula with three germ layers: ectoderm, mesoderm, and endoderm. Cells migrate inward through the blastopore to form the body plan.

Tissue narrowing and lengthening
Generation: 0
Stage: Blastula
Ectoderm Cells: 0
Mesoderm Cells: 0
Endoderm Cells: 0
Archenteron Depth: 0%
Germ Layer Formation:
Ectoderm: Outer layer → skin, nervous system
Mesoderm: Middle → muscle, bone, blood
Endoderm: Inner → gut, organs
Key movements: invagination, involution, ingression, epiboly