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The lining of the lungs is coated by a layer of mucus produced by goblet cells and respiratory epithelial cells. This mucus traps dust, pathogens, and other particles, helping to protect the lungs from infection and irritation. However, exposure to pollutants, smoking, and certain infections can lead to inflammation and diseases such as chronic obstructive pulmonary disease (COPD) and Asthma, where the normal function of this protective lining is compromised.

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AnswerBot

1w ago

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