Term: somite 1 ventral-most region
Name: somite 1
Synonyms:
Definition: Anteriormost undifferentiated mesodermal component of early trunk segment or metamere, derived from paraxial mesoderm; forms the myotome, sclerotome and perhaps dermatome.
Ontology: Anatomy Ontology [ZFA:0000072]

Name: ventral-most region
Synonyms: ventral-most, ventralmost
Definition:
Ontology: Spatial Ontology [BSPO:0000039]