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] [ MP:0002231 http://en.wikipedia.org/wiki/Primitive_streak ]
Term information
- SCTID:361438007
- EMAPA:16072
- UMLS:C0033153 (ncithesaurus:Primitive_Streak)
- FMA:293110
- VHOG:0001202
- Wikipedia:Primitive_streak
- EHDAA2:0001525
- NCIT:C28402
- EHDAA:185
pheno_slim, early_development
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]
VHOG includes a very broad grouping here based on http://www.ncbi.nlm.nih.gov/pubmed/9609826
(...) the blastopore equivalent of chordates (germ ring in fish, marginal zone/blastopore lip in frog and node/primitive streak in chick and mouse) (...) (reference 1); Indeed, the primitive streak has been considered the homologue of the blastopore since the 1870s (reference 2).[well established][VHOG]