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Health, 12.11.2019 01:31 amunnik04

Very aggressive pathogens such as the bacterium responsible for tuberculosis can easily overwhelm the protective features of the respiratory system. less aggressive pathogens may be stopped by all of the following except
a. alveolar macrophages
b. air filtration in the nasal cavity
c. the olfactory epithelium
d. the mucus film lining much of the respiratory tract.

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