(The spinal cord is one of the most important parts of the nervous system, is connecting the brain to the body)
It's like a big nerve cord, white and cylindrical whose main function is to drive through the nerves that transmit electrical current sensations back to the brain and nerve impulses that carry brain responses to the muscles.
The spinal cord is housed in the whole interior of the spine and into it are so important cells such as stem cells.
Any signal that is produced in the body comes first to the bone and then is transmitted to the brain. For example, if someone on fire finger, the skin sensory nerve transmits the signal of danger to the bone and this immediately sends a command to the motor nerves to the hand to remove the danger.
This movement is a reflex and running before the person burning and pain.
Reflexes in the brain does not intervene unless we program, for example if we are going to sting with a needle to inject, the brain allows the needle reaches our body without run for the hills.
The spinal cord is very delicate, if any of the nerves in it comes to injury, lost contact with the brain and can not transmit signals, the nerves are like very thin wires if they break, they can not transmit signals.
If the injury is severe the damage is irreversible, is not hopeless, nerves will not function anymore and they did, which may be motor, ie the movement or sensory, or to feel something, it becomes to perform. So we must guard much and act with care and responsibility to avoid any accidents.
