| Name: | brain |
|---|---|
| Synonyms: | brain structure |
| Definition: | Cavitated compound organ which is comprised of gray and white matter and surrounds the cerebral ventricular system. |
| Ontology: | Anatomy Ontology [ZFA:0000008] |
| Name: | lumen formation, open tracheal system |
|---|---|
| Synonyms: | tracheal lumen formation |
| Definition: | Creation of the central hole of a tube in an open tracheal system through which gases flow. |
| Ontology: | GO: Biological Process [GO:0035149] QuickGO AmiGO |