Respuesta :

Histamine causes local blood vessels to dilate, increasing blood flow to the area. Increased blood flow brings white blood cells to the infection site, where they can attack pathogens.  The increased blood flow also causes swelling and redness in the infected area.  The whitish liquid, or pus, associated with some infections contains white blood cells, dead cells and dead pathogens
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Answer:

Histamine makes nearby veins enlarge, expanding blood stream to the zone.  

Explanation:

Expanded blood stream conveys white platelets to the disease site, where they can assault pathogens.  The expanded blood stream likewise causes swelling and redness in the tainted area.  The whitish fluid, or discharge, related with a few contamination contains white platelets, dead cells, and dead pathogens. An assortment of microorganisms can cause infection. Pathogenic living beings are of five primary composes: infections, microorganisms, growths, protozoa, and worms. Some normal pathogens in each gathering are recorded in the section on the right.

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