Term: pharyngeal pouch mesenchyme
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]