Sagot :
Answer:
Mucus is secreted from two distinct areas within the lung tissue. In the surface epithelium, which is part of the tissue lining of the airways, there are mucus-producing cells called goblet cells. Mucus is sticky and this helps to trap dust particles, bacteria and other inhaled debris. ...
Explanation:
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The major function of mucus is to protect the lung through mucociliary clearance against foreign particles and chemicals entering the lung.