A complex and coordinated series of cellular movements that occurs at the end of cleavage during embryonic development of most animals. The details of gastrulation vary from species to species, but usually result in the formation of the three primary germ layers, ectoderm, mesoderm and endoderm.

biological_process

GO:0007369

http://purl.obolibrary.org/obo/uberon.owl, http://purl.obolibrary.org/obo/go.owl, http://purl.obolibrary.org/obo/cl.owl

• gastrula stage

• formation of primary germ layer