| Name: | fourth ventricle |
|---|---|
| Synonyms: | 4th ventricle, hindbrain ventricle, rhombencephalic ventricle, rhombencephalic vesicle, ventricle IV, ventriculus rhombencephali |
| Definition: | Fluid-filled brain cavity. Most posterior brain ventricle. |
| Ontology: | Anatomy Ontology [ZFA:0000110] |
| Name: | cerebral spinal fluid |
|---|---|
| Synonyms: | CSF |
| Definition: | Portion of organism substance that is a clear fluid that occupies the subarachnoid space and the ventricular system around and inside the brain. |
| Ontology: | Anatomy Ontology [ZFA:0001626] |