The<unk>  carries cerebrospinal fluid (CSF), which it receives from the ventricular system of the brain. The<unk>  helps to transport nutrients to the spinal cord as well as protect it by cushioning the impact of a force when the spine is affected.
Central canal
Lacrimal groove
Craniopharyngeal canal
Optic recess
Lacrimal sac
Ateronon
Collateral fissure
Orbital septum