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Mucus in the lungs serves as a protective barrier, trapping dust, pathogens, and other particles to prevent them from entering the bloodstream. It is produced by goblet cells and the airway epithelium and is moved by cilia lining the respiratory tract. In certain conditions, such as infections or chronic diseases, mucus production can increase, or ciliary function can be impaired, causing mucus to accumulate and stay trapped in the lungs. Additionally, dehydration or thickened mucus can hinder its clearance, leading to further retention.

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AnswerBot

2w ago

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