Metaplasia is a condition where one differentiated cell type is replaced by another cell type, often changing from cells sensitive to stress into cells able to withstand an adverse environment.
Liquefactive Necrosis is characterized by the digestion of the dead cells, focal bacterial or, occasionally, fungal infections, and Pus - creamy yellow necrotic material.
Coagulative Necrosis is characterized by the architecture of dead tissues being preserved, affected tissues exhibiting a firm texture, and the injury denaturing not only structural proteins but also enzymes and so blocking the proteolysis of the dead cells.
Fat Necrosis is characterized by focal areas of fat destruction, from the release of activated pancreatic lipases, acute pancreatitis (fat saponification), and Ghost fat cells, calcium deposits, inflammation.