17-08-2020
Health

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arry is taking a walk in the park. The pollen in the air makes him sneeze constantly. What line of defense is his immune system exhibiting?

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17-08-2020

Answer:

first line of defense

Explanation:

The immune system of the body considers it as germs and starts releasing histamines against it. This alerts the brain and the person sneezes more the more it encounters the pollen grains. This reaction of the body is first line of defense.

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