Term Name:	primitive streak
Synonyms:	primitive streak - blastopore - germ ring
Definition:	The primitive streak is a structure that forms during the early stages of avian, reptilian and mammalian embryonic development[WP]. the midline ridge of the embryonic epiblast that later develops into mesoderm and endoderm[MP]
Ontology:	Uberon Ontology [UBERON:0004341]