The nerves are the toughest and most robust members of our body. Imagine that if an animal’s muscle is removed with its nerves and protected in a salty water that is suitable for body movements, it will continue to live for hours. If we wake this nerve end after hours with a little electricity, the muscle immediately attacks itself and takes care of itself. We apply strong or abrasive pressure to our members of this firm body, sometimes with blows coming from outside, and then we begin to feel pain. This pressure is due to some other body members, such as the bones, cartilage, or muscle, which are the other organs in our body.