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Tissue Repair
1) The severed blood vessels bleed out and inflamatory chemicals are released. This causes the blood vessels to dilate and become more permeable so white blood cells, clotting proteins, etc can get to the injury faster. Clotting is initiated and scab forms
2) Granulation tissue(delicate pink tissue) forms and capilary buds restore vascular supply. Collagen fibers bridge the gap and macrophages destroy dead tissue. Surface epithelial cells begin to migrate over granulation tissue
3) Scab detaches and epitheulim thickens until it fully resembles that of the surrounding skin.