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Glia cells are specialized cells of the nervous system which have
got two objectives: glue
neurons together and associate neurons. There are four types of glia cells: protoplasmatic astrocytes, fibrous astrocytes, oligodendrocytes and microglia. Astrocytes are cells with starry form that they give physical and nutritional support to the neurons: 1) they clean the brain "rubbles"; 2) they lead nutrientes to the neuron; 3) they support to the neurons in his place; 4) they eat parts of dead neurons; 5) they regulate the content of the space extracelular.
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