Nervous System

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Nervous System
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Diagram of the nervous system

• The top of the picture is the brain.
• The line down the middle of the picture
• is the spinal cord.
• All of the blue lines in the picture are
• nerves.

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Nervous system

• The nervous system is one of many major systems
  in the human body. It is made up of your brain,
  spinal cord and all of the nerves in your body.
• The nervous system is a network of cells that
  communicate information throughout your body and
  control everything you do. For examplewalking,
  breathing and thinking. Without your nervous
  system you couldnt do any of these things.

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Your Central Nervous System
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Your Peripheral Nervous System
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Neurons?
Neurons?

• The nervous system contains many petite (tiny)
  specialized cells that are called neurons.
• These small and unique cells have a big job to do
  in your body, the complexity and diversity of the
  nervous system is depending on the connections
  between neurons, which rely on a limited number
  of different signals transmitted within the
  neurons, to other neurons, muscles and glands.

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Brain?

• Your brain is in fact the boss of your entire
  body. It runs the show and controls just about
  everything you do, even when youre asleep.
• The typical brain weighs about 3 pounds (1.4
  kilograms). Different parts of the brain have
  different jobs like the cerebrum (suh-ree-brum)
  which controls the ability to let you move
  around, think and speak. The cerebellum
  (sair-uh-bellum) controls the ability for you to
  have coordination and balance. The thalamus
  carries messages from you sensory organs such as
  your tongue, eyes, ears and skin. The brain stem
  controls your breathing, heart beat and
  digestion, it also connects the brain to the
  spinal cord. The spinal cord acts like a highway,
  where messages from the body travel to the brain
  at over 2 hundred miles per hour. From the brain
  the messages are sent back again, in the messages
  are tiny electrical signals that also travel at
  the same rate.

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Why is it called the nervous system?

• The nervous system is not called the nervous
  system because it is nervous, it is actually
  called the nervous system because it is made up
  of billions of nerve cells. One hundred billion
  of these cells can be found in the brain.
• You have nerves in your nervous system to help
  you feel sensations, like when water is too hot
  or too cold. Then the nerves deliver their
  message to the brain and the brain understands
  that the water is either too hot or too cold.

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Eyeswhy do they tear?

• Have you noticed when you get dust in your eye
  that it starts to tear, but your not sad. This
  is actually protecting your eyes by keeping them
  moist. When your eyes tear up, everything is
  washed away.

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Nose?
Nose?

• You just came home from school and you smell
  dinneryum! Then you smell your nasty gym bag.
  How are you able to smell this stuff? Your nose
  lets you smell and it's a big part of why you are
  able to taste things too.

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How the nervous system works with other systems

• The nervous system works with the respiratory
  system because the nose is the gateway to the
  lungs which is how our bodies are supplied with
  oxygen.
• The nervous system works with your digestive
  system by pushing your food down your esophagus
  and into your stomach.

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Fun facts

• 1. Did you know that a humans cerebrum is bigger
  than an animals cerebrum.
• 2.You have over 100 billion cells in your brain.
• 3.Your cells travel at the speed of 200 miles per
  hour to the brain and back consecutively.
• 4.Did you know that your nose helps you taste
  stuff in your mouth.
• 5.Did you know that when the doctor taps your
  knee it is testing your nervous system and your
  reflexes.