| Name: | pharyngeal arch 1 |
|---|---|
| Synonyms: | mandibular arch, visceral arch 1 |
| Definition: | The first pharyngeal arch, also known as the mandibular arch, forms the jaw. The first pharyngeal arch gives rise to elements of the jaw, with the most anteriorly positioned cranial neural crest cells contributing to mandibular arch structures, including Meckel's and palatoquadrate cartilages that constitute the lower and upper jaw respectively. |
| Ontology: | Anatomy Ontology [ZFA:0001612] |
| Name: | ectomesenchyme |
|---|---|
| Synonyms: | |
| Definition: | Portion of tissue that develops from the cranial neural crest and which cells populate a series of pharyngeal arches from which develops the support skeleton of the jaw and gills. |
| Ontology: | Anatomy Ontology [ZFA:0005771] |