| Name: | pharyngeal arch 4 | 
|---|---|
| Synonyms: | branchial arch 2, gill arch 2, visceral arch 4 | 
| Definition: | |
| Ontology: | Anatomy Ontology [ZFA:0001607] | 
| Name: | ventral region | 
|---|---|
| Synonyms: | |
| Definition: | Anatomical region ventrally located on the body or body part. | 
| Ontology: | Spatial Ontology [BSPO:0000084] |