What protects the brain spinal cod and peripheral nerves?

The brain and spinal cord are protected by the bony structures of the skull and vertebral column, respectively. Additionally, they are surrounded by three layers of membranes called the meninges, which include the dura mater, arachnoid mater, and pia mater. Cerebrospinal fluid (CSF) also cushions and provides a protective barrier around the brain and spinal cord. Peripheral nerves are primarily protected by their own connective tissue sheaths, which help shield them from injury.