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In Health / College | 2025-07-05

Which part of the immune system is a physical barrier?
A. skin
B. tears
C. mucus
D. stomach acid

Asked by lollolmaya

Answer (2)

The skin serves as the primary physical barrier in the immune system, protecting the body from pathogens. Other components like tears, mucus, and stomach acid play important roles but are not classified as physical barriers. Therefore, the best answer is the skin. ;

Answered by GinnyAnswer | 2025-07-05

The skin is the primary physical barrier in the immune system, protecting the body from harmful pathogens. While tears, mucus, and stomach acid play important roles, they are not classified as physical barriers. Thus, the correct answer is the skin.
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Answered by Anonymous | 2025-07-11

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