Question

What is an example of a mechanical barrier for our immune system?

a. skin
b. nose hairs
c. tonsils
d. lungs

Answer 1

I think it is nose hairs because it keeps harmful things from entering through your nose.

Answer is B.

*Please correct me if I am wrong.

Answer 2

a skin

Step-by-step explanation:

Mechanical barriers physically block pathogens from entering the body. The skin is the most important mechanical barrier. In fact, it is the single most important defense that the body has against pathogens