Ligaments and muscles connect these vertebrae, and a disc separates most of the vertebrae and acts like a cushion to absorb shock along the spine. Each vertebra is numbered and grouped into 5 regions.

These nerve pairs spread throughout your body to deliver commands from your brain and spinal cord to and from parts of your body. Diagram. The central nervous system and peripheral nervous system work ...

The protein netrin1 has an entirely unanticipated role in organizing the spinal cord during early development.