INFLAMMATION IMAGE: overview of the acute inflammatory response. The dark purplish tube represents a post capillary venule. It is here that immune cells leave the blood stream to engage in a localised inflammatory reaction. Neutrophils are shown as purple cells and a macrophage is shown in green. Invading bacteria are shown as golden spheres that enter through a tear in the skin. The skin is shown as swollen and red to represent the appearance of inflammation.