The divisions and main structures of the nervous system
1 / 11

The Divisions and Main Structures of the Nervous System - PowerPoint PPT Presentation

  • Uploaded on

The Divisions and Main Structures of the Nervous System. Hwa Won and Samuel. Vocabulary. Brain : main part of central nervous system made of about 100 billion neurons Nerve : Bundle of nerve fibers that carry sensory information

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'The Divisions and Main Structures of the Nervous System' - pomona

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript


  • Brain: main part of central nervous system made of about 100 billion neurons

  • Nerve: Bundle of nerve fibers that carry sensory information

  • Spinal cord: Thick whitish nerve tissue enclosed by vertebrae that links brain to most nerves

  • Cerebellum: largest part of brain that works over the senses and causes skeletal muscles to move and complex mental processes

  • Reflex: automatic response that comes out very quickly without control of the brain.

The brain
The Brain

  • Contains about 100 billion neurons

  • The skull, 3 layers of connective tissue, and fluid help protecting brain

The cerebellum
The Cerebellum

  • Keep balance of body

  • Organize body and thought in coordinate way


  • Control body’s automatic actions (i.e. breathing/ heart beating)

The central nervous system
The Central Nervous System

  • It is like a control center of the body

  • Spinal cord links the central nervous system with the peripheral nervous system

  • Brain is a part of the central nervous system

  • The nerves in your body work like a network of interconnected wires

The peripheral nervous system
The Peripheral Nervous System

  • Network of nerves other than central nervous system

  • Connect nerves from central nervous system to whole body

  • Impulse travel through spinal nerve in 2 directions

     To/ from central nervous system

The peripheral nervous system continued
The Peripheral Nervous System (continued)

  • Somatic nervous system control voluntary actions

    (i.e. using fork/ tying shoelaces)

  • Automatic nervous system control involuntary actions

    (i.e. regulating smooth muscles)

The spinal cord
The Spinal Cord

  • The vertebral column (backbone) surrounds it and therefore protects it

  • It links the brain and the peripheral nervous system

  • It is also protected by a watery fluid

  • It is about 45 cm long in men and about 43 cm in women


  • A rapid, involuntary response to a thread

  • Sometimes only the spinal cord is involved (no brain involvement)

  • Used for protection, i.e. a burn after you touch a hot surface

  • As your muscles contract, another impulse goes from your handto your brain, simultaneously

  • This impulse makes you feel pain

Safety and the nervous system
Safety and the Nervous System

  • Just like any other part of your body the nervous system can be easily damaged

  • Concussion – an injury of the brain, when the cerebrum hits the skull

    • Occurs if you hit your head very hard

    • Sometimes heals itself, but if not and uncured it can cause brain damage

    • Wearing a helmet can prevent concussion in activities such as sports

  • Spinal cord can be easily injured, too

    • Occurs when the vertebrae is injured

    • Very dangerous, it can paralyze body parts or even the whole body

Wear a Helmet!