Final answer:
Ante mortem (Before death) injuries show signs of inflammation such as redness and swelling, indicating an active immune response, while post mortem (After death) injuries do not exhibit these signs as the biological processes required for inflammation end after death.
Step-by-step explanation:
Injuries that occur ante mortem (before death) show signs of inflammation, while post mortem (after death) injuries do not. Inflammation is the standard, initial response of the body to injury and is evidenced by the four cardinal signs: redness, swelling, pain, and local heat, with a possible fifth being loss of function.
These signs of inflammation indicate that the body's immune response is active in an attempt to limit the extent of injury and initiate the repair and regeneration of the damaged tissue. In contrast, post mortem injuries lack this inflammatory response, as the biological processes necessary for inflammation cease after death.