Nucleus Medical Media - "The vertebral column, also called the spine or backbone, is made up of multiple vertebrae that are separated by spongy disks and classified into 4 distinct areas. The
Vertebral column - Wikipedia
Quick Facts: Injuries of the Spine and Spinal Cord - Merck Manuals Consumer Version
Spinal cord trauma Information | Mount Sinai - New York
Definition of vertebral column - NCI Dictionary of Cancer Terms - NCI
Anatomy of the Spine | Spinal Cord Injury Information Pages
Spinal Cord & Column | Spinal Cord Injury Information Pages