Spinal cord is a part of the central nervous system that is housed inside the vertebral column. It is an extension of the brain and is responsible for reflex actions. Spinal cord receives impulses from the sense organs and controls body responses.

The spinal cord is protected by vertebrae and meninges (protective membranes) around it. The cerebrospinal fluid fills the spaces between these meninges and acts as a cushion thereby protecting the spinal cord and also the brain.