| Name: | gill raker |
|---|---|
| Synonyms: | gill rakers |
| Definition: | Dermal bone that is a small anterior projection present on all of pharyngeal arches 3-7. They support the gills. The rakers have epithelial denticles and both their gross and fine structure serves to retain food particles in the mouth. |
| Ontology: | Anatomy Ontology [ZFA:0000356] |
| Name: | aplastic |
|---|---|
| Synonyms: | aplasia, undeveloped |
| Definition: | Absence of an organ, tissue or cell due to failure to develop from a primordium or precursor cell. |
| Ontology: | Phenotypic Quality Ontology [PATO:0001483] |