The function of the spinal cord in the central nervous system
The spinal cord
The central nervous system is composed of the spinal cord and the brain , The spinal cord is a cylindrical cord from which the spinal nerves extend , The spinal cord is 40 to 50 cm long and 1 cm to 1.5 cm in diameter .
The spinal cord extends in a channel within a series of the vertebrae in the backbone ( the vertebral column ) for protection , and it is the most important structure between the body and the brain .
The spinal cord is divided into four different regions which are the cervical , the thoracic , the lumbar and the sacral regions , The spinal cord is consists of the internal gray matter that has the shape of the letter H and surrounded by an external white matter .
The structure of the spinal cord is opposite to that of the two cerebral hemispheres , The spinal cord is the main pathway for information connecting the brain and the peripheral nervous system .
The function of the spinal cord
The spinal cord delivers the nerve messages from the body organs to the brain and vice versa , The spinal cord is responsible for the reflexes ( a group of reflex action ) such as the withdrawal of the hand quickly when touching a hot surface .