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How do fibroblasts help repair damaged tissue?

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Collagenous fibers — connective tissue Randomly oriented collagenous fibers of varying size in a thin spread of loose areolar connective tissue (magnified about 370 ×).

Fibroblasts are the primary cells of connective tissue and play a critical role in repairing damaged tissue following an injury. When tissue damage is substantial or cannot be fully regenerated, fibroblasts facilitate the repair process through the following steps:12

Migration and Proliferation: Following an injury, fibroblasts migrate to the site of the damage and proliferate to form a loose framework of connective tissue known as granulation tissue.234
Collagen Deposition: Fibroblasts synthesize and deposit collagen, a structural protein that provides mechanical strength to the healing area.134
Scar Formation: As the repair progresses, fibroblasts continue to produce collagen, eventually forming a dense scar that replaces the original tissue.34

While this process is essential for restoring structural integrity, it is a form of repair rather than perfect regeneration. Because the resulting scar tissue consists of densely packed collagen, it may not replicate the original architecture or function of the damaged organ or tissue.34