Final answer:
The spinal cavity contains the spinal cord and its protective meninges, all of which are encased by the vertebrae and cushioned by cerebrospinal fluid.
Step-by-step explanation:
The organs found within the spinal cavity (vertebral canal) are primarily the spinal cord itself and its meninges, which are protective coverings. The spinal cord, being a continuation of the brain stem, is a major part of the central nervous system and extends from the base of the skull, through the vertebral canal, down to the lower back. The vertebral column, made up of individual bones called vertebrae, encases the spinal canal. The spinal cord is further cushioned by cerebrospinal fluid, which circulates within the spinal cavity and the brain's ventricles.