| Name: | cranium | 
|---|---|
| Synonyms: | cranial skeleton | 
| Definition: | Skeletal system that is part of the head, including the splanchnocranium, chondrocranium, and dermatocranium. | 
| Ontology: | Anatomy Ontology [ZFA:0000737] | 
| 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] |