Why does the damage of the nervous system cause paralysis of the body?

Paralysis is most often caused by damage in the nervous system, especially the spinal cord. The nervous system is what give signals to the different parts of our body so that if it is damaged signals and messages could not be transported. If the central nervous system is damaged, paralysis frequently affects the movement of a limb as a whole, not the individual muscles. 

Photosynthesis. . .