Coordinated tissue repair involving growth, migration, matrix remodelling and immune responses. Persistent deployment of related activities can support a tumour without constituting productive repair.
A scar is the tissue remaining after repair has replaced or reorganized injured tissue. Its extracellular structure can differ from the original architecture, changing strength, flexibility or function. Closure of a surface therefore does not necessarily demonstrate complete regeneration.
Granulation tissue is the vascular, cellular tissue formed during many wound-healing responses. New vessels, matrix-producing cells and immune cells contribute to it. It is a stage of repair rather than a synonym for a mature scar.

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