Glia are specialized cells of the nervous system whose main function is to "glue" neurons together. Specialized glia called Schwann cells secrete myelin sheaths[?] around particularly long axons. Glia of the various types greatly outnumber the actual neurons.
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... before married Catherine, Charles's sister.
Charles V initiated many wars with France during his reign, first fighting against them in Northern Italy in 1521. Later, ...