The spinal cord is a long pipe-like structure arising from the medulla oblongata, part of the brain consisting of a collection of nerve fibres, running through the vertebral column of the backbone.
In adults, the spinal cord is usually 40cm long and 2cm wide. It forms a vital link between the brain and the body. It has a small canal, called the central canal, in the centre.
The major functions of the spinal cord are as follows:
The spinal cord is concerned with reflex actions. Responses that are automatic and spontaneous and takes place without the involvement of the brain are called reflex actions.
It conducts impulses from the muscles and skin to the brain.
It also conducts impulses from the brain to the muscles of the limb and trunk.