Final answer:
The central nervous system is shielded by bones, membranes called meninges, and cerebrospinal fluid, which provides cushioning and support.
Step-by-step explanation:
The entire delicate central nervous system is protected by cerebrospinal fluid, meninges, and the skull. The primary physical protections for the brain and spinal cord include the bones of the skull and spinal vertebrae, while the meninges provide a three-layer membrane that encapsulates them. Cerebrospinal fluid lies between two of these meningeal layers, offering additional protection and cushioning. The meninges consist of the dura mater, arachnoid mater, and pia mater, each playing a critical role in the protection of our central nervous system.