| Name: | pharyngeal pouch | 
|---|---|
| Synonyms: | pharyngeal pouches | 
| Definition: | Outpocketings of pharyngeal endoderm that interdigitate with the neural crest derived pharyngeal arches. The pouches later fuse with the surface ectoderm to form the gill slits. | 
| Ontology: | Anatomy Ontology [ZFA:0001106] | 
| Name: | mesenchyme | 
|---|---|
| Synonyms: | |
| Definition: | A mesh-like cell arrangement, less compact than an epithelium. | 
| Ontology: | Anatomy Ontology [ZFA:0000393] |