Spinal cord
The elongated part of CNS that runs downward in the spinal canal as continuationof medulla oblongata is called spinal cord.
The functions of the Spinal Cord are:
Spinal cord is the link between brain and nerves of the body.
It is a pathway for carrying information to brain and sending orders to the organs.
Although, spinal cord functions under brain, it has some autonomy in performing simple actions like knee jerk.