The nervous system - Your brain is full grown by age 6. It...

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The Nervous System Rabiya Ashraf Sahibzada Everyday Science Mass comm
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Your nervous system has three components… Brain Nerves Spinal cord
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The Most Important Part of the Nervous System… Your brain controls everything that happens in your body .
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The brain has two sides. The left side of the brain controls the right side of the body. The right side of the brain controls the left side of the body.
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Nerves are like telephone lines. They send messages all over your body. These messages move through your body faster than you can blink your eyes .
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Nerves travel through the spinal cord. Your spinal cord is like an extension cord that runs down the center of your back. It is protected by the backbone.
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Interesting Facts Each side of the brain controls the opposite side of the body.
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Unformatted text preview: Your brain is full grown by age 6. It weighs about three pounds. Your brain is made mostly of water. (85%) 3 main types of nerve cells 3 main types of nerve cells sensory neurone relay neurone motor neurone Sensory neurons Sensory neurons Carries impulses from receptors e.g pain receptors in skin to the CNS( brain or spinal cord) Relay neuron Relay neuron Carries impulses from sensory nerves to motor nerves. Motor neuron Motor neuron Carries impulses from CNS to effector e.g. muscle to bring about movement or gland to bring about secretion of hormone e.g ADH Transmission of signals Enjoy :D http://www.youtube.com/watch?v=xRkPNwqm0mM http://www.youtube.co m/watch?v=i-NgGKSNiNw...
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The nervous system - Your brain is full grown by age 6. It...

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