Backbone
The dorsal cavity is completely enclosed in bone and surrounds the brain and spinal cord.
The spinal-canal which surrounds the spinal cord .
The bone protects it.
The backbone surrounds and protects the spinal cord in vertebrates. It provides structural support to the body and allows for flexibility and movement while also protecting the delicate nerves of the spinal cord.
The lumbar thecal sac is a membrane that surrounds the spinal cord. It is filled with cerebral spinal fluid. It is in the lower back.
Meningitis is an infection of the fluid that surrounds the spine and brain.
The lining of the spinal cord is called the "Dura". It is not Dura, Dura is a meninge which is the top layer of protective covering for both the brain and the spinal cord. The lining of the spinal cord is called the Endyma, it is derived from a Greek word and you can google the variations. PS: The other two meninges are the Arachnoid which is second and a membrane called Pia mater which surrounds the brain.
Myelin is the material that surrounds and protects the spinal cord, and it helps conduct information signals up and down the cord. Myelin is rich in protein.
The spinal column is a series small bones that helps support the body and surrounds the spinal cord which has nerve links from the cord to various parts of the body and leading back to the brain.
Tethered Spinal Cord is a condition where the spinal cord is attached to the spinal column and that causes the cord to become stretched.
The tough, fibrous membrane, which lines the cavity of the skull and spinal column, and surrounds the brain and spinal cord; -- frequently abbreviated to dura.
It is the area between the pia matter and the arachnoid membrane of the brain. The pia matter is part of the membrane that surrounds the brain and spinal cord. The arachnoid membrane is the inner layer of three layers that surround the brain and spinal cord.