cerebrospinal fluid csf it protects the brain and spinal cord from impact, eliminates waste from the brain and spinal cord

anatomical anatomy and aqueduct arachnoid biology blood brain central cerebral cerebrospinal choroid cord csf diagram duct dura eliminates fluid from head health human hydrocephalus illustration immunological impact infection inflammation lateral lumbar medical medicine meninges meningitis mental nerve nervous neurology neurone perilymphatic plexuses protects puncture science skin skull space spinal spine subarachnoid system ventricle ventricles waste