Human Airway Inflammation

Rubor (redness), tumor (swelling), calor (heat), and dolor (pain) are the classical signs of inflammation. These features are obvious in the skin, where injury or disease causes flare, wheal, and painful burning sensations. Vasodi- tation underlies the flare and heat, plasma exudation the swelling, and acti- tion of sensory nerves relays pain. In chronic conditions, skin biopsies show inflammatory...