Biology Chapter 8.1
Help!
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| The principal organ of the nervous system. | brain
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| A thick bundle of nerve fibers located within the spinal cavity. | spinal cord
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| 31 pairs of nerves at intervals along the spinal cord that branch from the cord and extend out of the spinal cavity through the gaps between the vertebrae. | spinal nerves
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| 12 pairs of nerves that branch directly from the brain stem and transmit nerve signals to and from the eyes, ears, mouth, face, and scalp. | cranial nerves
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| A triple layer protective tissue. | meninges
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| A clear fluid that circulates through the fibers of the arachnoid, serving to cushion the brain when you bump your head. | cerebrospinal fluid
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| Support and insulate nerve tissue. | glial cells
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| nerve cells | neurons
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| White, specialized covering. | myelin
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| A mass of cell bodies. | ganglion
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| A large nerve mass. | plexus
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| A group of cell bodies in the brain or spinal cord. | nerve center
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| Tightly sealed capillary walls that protects the central nervous system from being permanently damaged every time you get sick. | blood-brain barrier
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| A disease when invading microorganisms enter the nerve tissue and infect the meninges. | meningitis
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| A state of prolonged unconsciousness; serious brain damage can also result. | coma
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| A serious disease that attacks the spinal cord. | poliomyelitis
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| Bundles of nerve fibers branching from the brain and spinal cord and connecting the central nervous system to the extremities of the body. | nerve
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