| Phenotype: | branchiostegal ray osteoblast poorly differentiated, abnormal |
|---|---|
| Note: | This statement combines anatomy and/or ontology terms with phenotype quality terms to create a complete phenotype (EQ) statement. For detailed information on individual terms, click the hyperlinked term name. |
| Name: | branchiostegal ray |
|---|---|
| Synonyms: | branchiostegal rays |
| Definition: | Dermal bone that is a bilaterally paired and flattened element that supports the branchiostegal membrane. Three dermal branchiostegal rays form in the branchiostegal membrane ventral to the ceratohyal cartilage. The most posterior ray, branchiostegal 3, ossifies first (3.4 mm NL), and the most anterior ray, branchiostegal 1, ossifies last (5.5 mm NL). The most posterior two branchiostegals (2 and 3) insert externally on the ceratohyal; their anterodorsal tips are thickened triangles, and the rays are expanded. The bifurcated tip of the acinaciform anteriormost ray lies at the ventral margin of the ceratohyal. |
| Ontology: | Anatomy Ontology [ZFA:0000476] |
| Name: | osteoblast |
|---|---|
| Synonyms: | osteoblasts |
| Definition: | A bone-forming cell which secretes an extracellular matrix. Hydroxyapatite crystals are then deposited into the matrix to form bone. |
| Ontology: | Anatomy Ontology [ZFA:0009031] |
| Name: | poorly differentiated |
|---|---|
| Synonyms: | |
| Definition: | A cellular quality inhering in a bearer by virtue of its lacking most of the cellular characteristics which would allow it to be fully differentiated. |
| Ontology: | Phenotypic Quality Ontology [PATO:0002106] |