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ECB-STAGE-31
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Name: gastrula period
ECAO ID: 0000320 Definition: "Period during which complex and coordinated cellular movements take place and ultimately generate a three-layered embryo with inner tissues. A portion of cells will ingress, invaginate and/or migrate within the embryo and form the two inner layers (i.e. the endoderm and the mesoderm). The cells that remained outside will instead spread over the whole surface of the embryo and form the outer layer (i.e. the ectoderm)." |
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| Preceded By: blastula period | Succeeded By: mesenchyme blastula phase |
Component Stages: mesenchyme blastula phase, invagination phase, invagination episode, stage 12, stage 13, stage 14, stage 15