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| three main parts of the nervous system |
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| the brain, the nerves, and the spinal cord |
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| carry messages from your brain to your body and back again |
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| a large group of nerves in your backbone |
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| the parts of your body that God designed to help you react to the things around you |
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| the most important sense organs |
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| sight, hearing, smell, taste, and touch |
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| controls the amount of light entering the eye (the colored part of the eye) |
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| the opening which lets light into the eye (the black circle at the center of your eye) |
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| area where the image of the picture is made |
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| carries messages of pictures to the brain |
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| to move rapidly back and forth |
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| tube opening into other parts of the ear |
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| thin sheet of skin separating the outer ear from the middle ear |
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| hammer, anvil, and stirrup |
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| three small bones in the middle ear that continue vibrations |
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| liquid inside the inner ear that carries vibrations |
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| sends sound message to the brain |
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| tiny particles of a substance |
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| the little bumps on the tongue which contain nerves for the sense of taste |
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| the liquid waste that is given off through the pores of the skin |
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| the protective crust that forms over a wound when your skin has been cut |
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