spinal cord

Spinal cavity is one of the cavities in human body. It is a space between vertebrae through which spinal chord passes. It is also known as spinal canal or vertebral canal.

yes

The central canal of the spinal cord. The central canal, also known as ependymal canal, is the cerebrospinal fluid-filled space that runs longitudinally through the length of the entire spinal cord.

The Vertebral Cavity

This answer Above is WRONG...

It is the dorsal cavity!

both answers are technically wrong.. the dorsal cavity holds both the cranial and spinal cavities. the cranial cavity holds the brain and the spinal cavity holds the spinal cord.