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fibroblast
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fibroblasts
fibroblasts Phase-contrast microscopy of fibroblasts from a mouse embryo.

fibroblast

anatomy
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fibroblast, the principal active cell of connective tissue. Fibroblasts are large, flat, elongated (spindle-shaped) cells possessing processes extending out from the ends of the cell body. The cell nucleus is flat and oval. Fibroblasts produce tropocollagen, which is the forerunner of collagen, and ground substance, an amorphous gel-like matrix that fills the spaces between cells and fibres in connective tissue.

cytoskeleton
cytoskeletonBundles of actin filaments occur in the cytoskeletons of cells such as fibroblasts (mouse embryo fibroblasts shown; cells were stained with a green fluorescent-tagged peptide called phalloidin).

Fibroblasts appear to play an important role in wound healing, and this activity is thought to be regulated by cells known as fibrocytes residing in the tissue stroma. Following tissue injury, fibroblasts migrate to the site of damage, where they deposit new collagen and facilitate the healing process.

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Kara Rogers.