Quotation from: Manual of Surgery

Written by: Alexander Miles and Alexis Thomson

When a localised portion of tissue, for example, a piece of skin, is so
severely _crushed_ or _bruised_ that its blood vessels are occluded and
its structure destroyed, it dies, and, if not infected with bacteria,
dries up, and the shrivelled brown skin is slowly separated by the
growth of granulation tissue beneath and around it.