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Title:

The Nervous System

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The Nervous System The Nervous System Although the nervous system works as a single system, it can be broken down into two main divisions: Central Nervous System (CNS ... – PowerPoint PPT presentation

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Date added: 28 May 2019
Slides: 13
Provided by: hrsbtech
Learn more at: http://hrsbstaff.ednet.ns.ca
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Title: The Nervous System


1
The Nervous System
2
The Nervous System
  • Although the nervous system works as a single
    system, it can be broken down into two main
    divisions
  • Central Nervous System (CNS)
  • Peripheral Nervous System (PNS)

3
The Nervous System
Peripheral Nervous System
  • Central Nervous System

4
The Central Nervous System
  • The Central nervous system consists of two main
    parts
  • Brain
  • Spinal Cord
  • The CNS acts as a coordinating centre for
    incoming and outgoing information

5
Peripheral Nervous System
  • The peripheral nervous system (PNS) consists of
    nerves that carry information between the organs
    of the body and the central nervous system.

6
Peripheral Nervous System
  • The PNS can be even further divided into
    sub-divisions.
  • Somatic Nerves
  • Controls the skeletal muscle, bones, and skin
  • Autonomic Nerves
  • Control internal organs of the body

7
The Nervous System
Peripheral Nervous System
Central Nervous System
Brain
Spinal Cord
Somatic Nerves
Autonomic Nerves
8
Somatic Nerves
  • Somatic Nerves can also be divided into two types
  • Voluntary
  • Sensory
  • Relay information about the environment to the
    CNS
  • Motor
  • Initiate appropriate responses

9
Somatic Nerves
  • Sensory / Motor Nerves
  • EXAMPLES?

10
The Nervous System
Peripheral Nervous System
Central Nervous System
Brain
Spinal Cord
Somatic Nerves
Autonomic Nerves
Sensory
Motor
11
Autonomic Nerves
  • Control internal organs of the body
  • Involuntary
  • Also can be broken into two divisions
  • Sympathetic
  • Nerves that prepare the body for stress
  • Parasympathetic
  • Nerves that return the body to normal resting
    levels after adjusting to stress

12
The Nervous System
Peripheral Nervous System
Central Nervous System
Brain
Spinal Cord
Somatic Nerves
Autonomic Nerves
Sensory
Motor
Parasympathetic Nerves
Sympathetic Nerves
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