- Lateral Ventricle -> Interventricular Foramen (Monro)
- Third Ventricle -> Cerebral Aqueduct (Sylvius)
- Fourth Ventricle -> Lateral Apeture (Foramen of Luschka) + Median Aperture (Foramen of Magendie)
- Arachnoid -> Arachnoid Granulations
Cerebrospinal Fluid (CSF)
