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Keywords from Image Description:
Blastula. en This image shows the process of gastrulation Gastrulation occurs when blastula made up of one layer folds inward and enlarges to create gastrula gastrula has germ layersthe ectoderm the mesoderm and the endoderm Some of the ectoderm cells from the blastula collapse inward and form the endoderm The blastospore is the