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The Nervous System (Peripheral Nervous System).  Peripheral nervous System (PNS): all the parts of the nervous system except for the brain & spinal cord.

Published byNorma Owen Modified over 8 years ago

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Presentation on theme: "The Nervous System (Peripheral Nervous System).  Peripheral nervous System (PNS): all the parts of the nervous system except for the brain & spinal cord."— Presentation transcript:

1 The Nervous System (Peripheral Nervous System)

2  Peripheral nervous System (PNS): all the parts of the nervous system except for the brain & spinal cord Peripheral Nervous system

3  Peripheral nervous System (PNS): all the parts of the nervous system except for the brain & spinal cord  Connects all parts of the body to the brain & spinal cord Peripheral Nervous system

4  Peripheral nervous System (PNS): all the parts of the nervous system except for the brain & spinal cord  Connects all parts of the body to the brain & spinal cord  Nerves: carry information Peripheral Nervous system

5  Neuron: nerve cell that transfers electrical messages called impulses Peripheral Nervous system

6  Neuron Structure-  Cell body (nucleus & organelles) Peripheral Nervous system

7  Neuron Structure-  Cell body (nucleus & organelles)  Dendrites: short branches that receive messages Peripheral Nervous system

8  Neuron Structure-  Cell body (nucleus & organelles)  Dendrites: short branches that receive messages  Axons: elongated extensions that carry the message away Peripheral Nervous system

9  Neuron Structure-  Cell body (nucleus & organelles)  Dendrites: short branches that receive messages  Axons: elongated extensions that carry the message away  Axon Terminal: tip of the axon Peripheral Nervous system

10 2 types of neurons:  sensory:  Gather information  Receptors detect changes in/out body  heat receptors; light receptors Peripheral Nervous system

11 2 types of neurons:  motor:  Send impulses from brain/ spinal cord to body  Respond to impulses sent by sensory neurons Peripheral Nervous system

12 2 types of neurons:  example:  Heat receptors in hand feel the hot stove & send impulses to brain (sensory)  Motor neurons respond by sending impulses to arm muscles to remove hand from stove Peripheral Nervous system

13 Nerve: a collection of axons bundled together with blood vessels & connective tissue Peripheral Nervous system

14 Nerve: a collection of axons bundled together with blood vessels & connective tissue - connects the body to the brain and spinal cord Peripheral Nervous system

15 Nerve: a collection of axons bundled together with blood vessels & connective tissue - connects the body to the brain and spinal cord - contains both motor and sensory axons Peripheral Nervous system

16  Motor part of the PNS has two parts:  Somatic- under your control; voluntary; skeletal muscles Peripheral Nervous system

17  Motor part of the PNS has two parts:  Somatic- under your control; voluntary; skeletal muscles  Autonomic- controls functions that you do not think about; digestion Peripheral Nervous system

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