Answer:
The portion of the nervous system containing all the nerves outside the brain is the peripheral nervous system (PNS).
Step-by-step explanation:
The peripheral nervous system (PNS) is the portion of the nervous system that contains all the nerves outside the brain and spinal cord. It is responsible for transmitting sensory information from the body to the central nervous system (CNS), as well as transmitting motor commands from the CNS to the muscles and glands of the body.
The PNS can be further divided into two main branches: the somatic nervous system and the autonomic nervous system. The somatic nervous system controls voluntary movements and sensory perception, while the autonomic nervous system controls involuntary functions such as heart rate, digestion, and breathing.
The PNS is made up of all the nerves and ganglia (clusters of nerve cell bodies) that lie outside the CNS. These nerves and ganglia are responsible for transmitting information between the CNS and the rest of the body, allowing the body to interact with its environment and respond to internal and external stimuli.
Overall, the PNS plays a crucial role in allowing the body to function properly and respond to changes in the environment. It is responsible for transmitting sensory information to the CNS, as well as transmitting motor commands from the CNS to the muscles and glands of the body.