Astrocyte nerve cells. Fluorescent light micrograph of astrocyte cells from a human brain. Glial-fibrillary acidic protein, a type of intermediate filament (IF), part of the cell's cytoskeleton, has been dyed red. Cell nuclei, which contain the cell's genetic information, are blue. Astrocytes are a type of glial cell. They provide structural support and protection for neurons (nerves cells) and also supply them with nutrients and oxygen. The cells cannot transmit electric signals and so insulate neurons from one another.
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