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        | arachnoid mater; arachnoid; interior layer of the meninges |  | 
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        | cerebellum; posterior part of the brain |  | 
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        | cerebrum; largest part of the brain |  | 
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        | cortex [pl. cortices]; the outer layer (of an organ or biological structure) |  | 
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        | dendrite; threadlike extension of a neuron |  | 
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        | dura mater; outermost layer of the meninges |  | 
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        | ganglion [pl. ganglia]; collection of nervous tissue |  | 
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        | glia; supporting tissue of the brain and spinal cord |  | 
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        | marrow; medulla; inner portion (of an organ or structure) [pl. medullae] |  | 
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        | meninges; membranes covering the spinal cord and brain |  | 
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        | nerve; nervous system; nervous tissue |  | 
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        | pia mater; innermost layer of the meninges |  | 
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        | plexus; collection of nervous tissue; a collection of blood or lymph cells |  | 
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        | grey matter [of the nervous system] |  | 
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        | the pons Varolii [a bridge of tissue which connects portions of the nervous system within the brain]; any bridge of tissue within a structure |  | 
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        | ventricle; a small cavity |  | 
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        | loving; having a strong preference/affinity (for something/someone) |  | 
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        | persistent and irrational fear (of something/someone) |  | 
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