What is peripheral nervous system?
》Nervous system is divided into central nervous system and peripheral nervous system.
¤PNS:The system containing all the nerves that arise from brain amd spinal cord
What is peripheral nervous system?
The Peripheral Nervous System (PNS) is a network of nerves that branches out from the spinal cord and brain to connect the central nervous system (CNS) to the rest of the body. It is responsible for transmitting sensory information from the body to the brain and spinal cord, as well as carrying motor signals from the brain and spinal cord to the muscles and glands.
Components of the Peripheral Nervous System:
- Somatic Nervous System: Controls voluntary movements and transmits sensory information.
- Autonomic Nervous System: Regulates involuntary functions such as heart rate, digestion, and breathing.
- Sensory Nerves: Carry information from sensory receptors to the CNS.
- Motor Nerves: Transmit signals from the CNS to muscles and glands.
Functions of the Peripheral Nervous System:
- Sensory Function: Detects external stimuli and relays information to the brain.
- Motor Function: Controls muscle movements and glandular secretions.
- Autonomic Function: Regulates involuntary processes like heart rate and digestion.
- Reflex Function: Coordinates rapid responses to stimuli without involving the brain.
Divisions of the Autonomic Nervous System:
- Sympathetic Nervous System: Activates the body's fight-or-flight response.
- Parasympathetic Nervous System: Promotes rest and digest activities.
In conclusion, the Peripheral Nervous System plays a crucial role in connecting the CNS to the body's organs, muscles, and glands. It enables the body to respond to external stimuli, control voluntary movements, and regulate involuntary functions essential for survival.
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