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& dead tissue c. ependymal cells lining of the cerebrospinal cavities; cilia
move the fluid around d. oligodendrocytes form myelin sheaths to insulate nerves 2. supporting cells in the PNS a. satellite cells control the chemical environment b. Schwann cells form myelin sheaths around axons
B. neurons (nerve cells) 1. live a long time (your entire lifetime, if they stay healthy) 2. they cannot reproduce (they're amitotic); once they're gone,
they're gone 3. high metabolic rate; so they use a lot of glucose & oxygen 4. ther...
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