Answer:
histamin, wider, swelling
Explanation:
Inflammation is defined as the response of body's immune system to a stimulus (invasion of pathogen or any injury). Some of the inflammatory responses are swelling of wound, redness of wound and itching at injured area et-cetra.
Upon any injury, the injured cells releases a chemical including histamin which causes vasodilation and increased permeability of blood vessels. This chemical recruit white blood cells to the damaged area and initiate the healing process. This chemical allows the local blood capillaries more wider due to vasodilation effect. Under the influence of histamin, the endothelium lining become leaky and allows movement of fluid to interstitial tissue spaces. When the extra fluid moves from capillaries to damaged tissue, it causes swelling or called edema.
The white blood cells initiate phagocytosis of pathogens at injured area and destroy the pathogens. Due to increased pressure from edema and toxins released by pathogens, the pain sensation prolongs, even while the body is repairing the tissue.
Hence, the correct answers are histamin, wider, swelling.
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