Peripheral Nervous System

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Presentation transcript:

Peripheral Nervous System (PNS)

PNS All the nerves outside the brain and spinal cord Neurons are organized into bundles of axons (these are called nerves) The PNS consists of 2 parts: SOMATIC and AUTONOMIC

SOMATIC Sensory nerves that carry info from sense organs to the brain and spinal cord Motor nerves that relay commands from brain and spinal cord to muscles Perception, voluntary movement, reflexes

AUTONOMIC Regulates internal organs—heart, lungs, etc. Emotions and stress reactions The ANS is further divided into 2 parts: SYMPATHETIC—”fight or flight” reactions PARASYMPATHETIC—return to normal

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