- The peripheral nervous system (PNS) consists of nerve cells outside the central nervous system
- It allows the body to sense, organize, and react to information from the environment
- The PNS has sensory neurons (afferent neurons) and motor neurons (efferent neurons)
- Glial cells provide support for neurons and make up 90% of the brain
- Neurons, which receive and send messages, play a vital role in transmitting information throughout the nervous system
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