Biology / Unit 13 Bio 3263 short lesson, about 20 seconds
Inflammation Mechanism
Captions available
The idea
Inflammation dilates local blood vessels and increases their permeability, delivering more phagocytes and plasma proteins to an injury or infection site, producing redness, heat, swelling, and pain.
In practice
Histamine release from damaged tissue drives the vessel dilation that produces inflammation's visible redness and swelling.
Where people slip
Inflammation is a coordinated defensive response, not tissue malfunction, even though its symptoms feel uncomfortable.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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