Having a spinal column is a defining characteristic of most animals on Earth. It is the axial support structure that runs from the neck to the lower back and consists of a series of vertebrae and intervertebral discs. Although it is common to use the term "having a spine" to describe this anatomical feature, there are many synonyms or alternative ways to refer to it. Some of these include having a backbone, vertebrate, cordate, or having a spinal column. These synonyms are often used interchangeably, depending on the context in which they are being used. Regardless of the terminology used, having a spinal column is essential for maintaining body posture, movement, and physical protection of vital organs.