1. Destroy and or remove the injurious agent
2. Confine and limit spread of the agent
3. Repair damaged tissue
The exudate causes edema(water leaves tissues) and pain. Histamines, Prostaglandins, and leukotrienes. -vasodilative amines stimulate these phenomenon.
Margination-phagocytes stick to endothelium (cells lining vessels)
Diapedesis-extravasation to tissues by squeezing between endothelial cells