A stage defined by 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.

uberon

trilaminar stage, blastocystis trilaminaris stage, trilaminar blastoderm stage, trilaminar disk stage, trilaminar blastocyst stage, trilaminar germ stage

UBERON:0000109

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

• future coelemic cavity lumen
• paraxial mesoderm
• presumptive gut

• neurula stage

• gastrula