What Prevents Pathogens from Entering Our Bodies Through the Delicate

question 48

Multiple Choice

What prevents pathogens from entering our bodies through the delicate tissues of the lungs?

• A) the lining of the lungs has a low pH that creates an inhospitable environment for most pathogens.
• B) the tubes entering the lungs are lined with mucus that traps pathogens and is then removed from the respiratory system.
• C) the cells of the lungs are covered by several layers of dead cells that prevent pathogens from getting to living lung tissue.
• D) certain cells in the lungs produce toxins that paralyze pathogens before they can infect the body.

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