cerebrospinal fluid csf is a clear fluid in the brain and spinal cord

anatomical anatomy arachnoid biological biology blood body brain canal central cerebellum cerebral cerebrospinal clear cord cortex csf diagram disease dura educational fluid head health human hydrocephalus illustration immunological infection inflammation inside lobe mater medical medicine meninges meningitis mental nerve nervous neurology organ pia protection science scientific shunt skull space spinal subarachnoid system tissue use vector ventricle ventricles ventriculoperitoneal