| 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: | ventral region |
|---|---|
| Synonyms: | |
| Definition: | Anatomical region ventrally located on the body or body part. |
| Ontology: | Spatial Ontology [BSPO:0000084] |