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The structure of Peripheral Nervous system : - Coggle Diagram
The structure of Peripheral Nervous system :
have 43 nerve
31 from the spinal cord (spinal nerve)
12 pair from the brain (cranial nerves)
Have 2 neurons
Sensory (afferent)
detect various sensations ( pain & heat )
Transmit message through the CNS
Motor ( efferent )
Stimulate effectors to perform a function a reflex
Transmit message away from CNS
The Reflex Arc
Sensory neurons
Receive message from CNS
Effector ( muscle )
Receive by muscle to act based on message
Motor neurons
Receive message from ganglia which collect of sensory neurons soma
Respons of PNS
Voluntary response ( consciously controlled )
Somatic nervous system
Contol voluntary response
Sensory nd motor information
Innervate auter sections of the body ( skin & skeletal muscles )
Voluntary motor output
Involuntary response ( Unconsciously controlled )
Autonomic nervous system
Handle involuntary movement in the body
innervates internal organs
control vital function ( heart rate, respiration & breathing, and digestion system )
Sympathetic
fight & flight response system
Causes general alertness & excitement
body way of responding to a perceived threat
Parasympathetic
Rest & digest response system
restores the body to a calm or restful state