It is difficult to give an exact number of nerves in the human body since nerves are not discrete structures but are part of a complex network of interconnected cells that make up the nervous system. However, it is estimated that there are billions of nerve cells, or neurons, in the human body, along with trillions of supporting cells known as glia. These neurons and glia are organized into various regions and pathways within the central nervous system and peripheral nervous system to facilitate the transmission of information throughout the body.