Ontologies
PATO
Phenotype And Trait Ontology (PATO)
OWL
Last submission date February 1, 2025
ID http://purl.obolibrary.org/obo/UBERON_0006268
http://purl.obolibrary.org/obo/UBERON_0006268
https://agroportal.lirmm.fr/ontologies/PATO/UBERON_0006268
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Preferred name

notochordal process

Synonyms
chordamesoderm presumptive notochord
Definitions
The notochordal process grows cranially until it reaches the prechordal plate, the future site of the mouth. In this area the ectoderm is attached directly to the endoderm without intervening mesoderm. This area is known as the oropharyngeal membrane, and it will break down to become the mouth. At the other end of the primitive streak the ectoderm is also fused directly to the endoderm; this is known as the cloacal membrane (proctodeum), or primordial anus. A midline cellular cord formed from the migration of mesenchymal cells from the primitive knot.
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