Question

Why do we fall ill class 9 s.chand notes?

Answer 1

We fall ill if a foreign body enters our body and uses our body's mechanism to mutiply.

The foreign body attcks various parts of our body and the immune system in order to protect the body performs various functions. This is sometimes accompained with illness as a side effect.

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Answer 2

Because disease enters into the healthy person with unhealthy person with air.

#Hope this answer is helpful to you.