Many fast food chains design marketing promotions around popular sports and media events, and publicize contests as another way to get diners through their doors. References CBS News; Americans Are Obsessed with Fast Food: The Dark Side of the All-American Meal; Eric Schlosser; January 2001
Granulocytes. The leukocytes, or white blood cells, defend the body against infecting organisms and foreign agents, both in the tissues and in the bloodstream itself (see immunity).Human blood contains about 5,000 to 10,000 leukocytes per cubic millimeter; the number increases in the presence of infection.his overproduction suppresses the production of normal blood cells. Conversely, a sharp decrease in the number of leukocytes (leukopenia) strips the blood of its defense against infection and is an equally serious condition.
The immune system recognizes invaders in a complex way. The two lymphocyte groups use different strategies. B cells can attack the intruder directly. T cells require assistance from B cells or other white blood cells that ingest and digest foreign invaders.he immune system recognizes invaders in a complex way. The two lymphocyte groups use different strategies. B cells can attack the intruder directly. T cells require assistance from B cells or other white blood cells that ingest and digest foreign invaders.