ANATOMY

Detailed explanation-1: -Each vertebra is separated by a disc. The vertebrae surround and protect the spinal cord. The spinal cord is divided into segments, each containing a pair of spinal nerves that send messages between the brain and the rest of the body.

Detailed explanation-2: -A protective membrane called the dura mater covers the spinal cord. The dura mater forms a watertight sack around the spinal cord and the spinal nerves. Inside this sack, the spinal cord is surrounded by spinal fluid.

Detailed explanation-3: -Both the brain and the spinal cord are protected by bone: the brain by the bones of the skull, and the spinal cord by vertebrae, a set of ring-shaped bones. They’re both cushioned by layers of membranes (called meninges) and cerebrospinal fluid.