What are nerves primarily made of?

Nerves are primarily composed of bundles of fibers that transmit information throughout the body. These fibers, known as axons, are long projections of nerve cells (neurons) that carry electrical signals called action potentials. The structure of nerves allows for the rapid communication of information between different parts of the body, including signals from the brain to muscles or sensory information from the body to the brain.

The complex arrangement of these fibers, along with supportive cells such as glial cells, ensures effective signal transmission and protection of the neurons. This bundle formation is essential for the functionality of the nervous system, enabling coordinated responses to stimuli and facilitating a wide range of bodily functions.

Understanding this structure is fundamental to grasping how the nervous system operates and supports the overall biology of organisms.