periferal nervous system
nerves extending from brain and spinal cord
The peripheral nervous system (PNS) is the part of the nervous system that lies outside of the central nervous system (CNS), which includes the brain and spinal cord. The PNS is comprised of all the nerves that extend from the brain and spinal cord, and carry messages to and from all parts of the body.
The PNS has two main components: the somatic nervous system and the autonomic nervous system. The somatic nervous system controls voluntary movements of the muscles and interactions with the environment, while the autonomic nervous system controls involuntary functions of the body such as heart rate, digestion, and respiration.
The PNS can also be divided into sensory and motor components. The sensory nerves of the PNS carry information from the body’s receptors (such as the skin, eyes, and ears) to the CNS, while the motor nerves carry information from the CNS to muscles and glands.
While the CNS is responsible for processing and interpreting sensory information and coordinating motor responses, the PNS plays a vital role in relaying information between the CNS and the rest of the body, allowing for communication between different parts of the body and ensuring proper function.
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