Debris trapped on the sticky mucus lining the respiratory airways is primarily cleared away by the alveolar macrophages.

Question

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The primary mechanism for clearing debris trapped in the sticky mucus lining the respiratory airways is the action of cilia, tiny hair-like structures that beat in a coordinated manner to move mucus and trapped particles upwards towards the throat, where they can be swallowed or expelled. Alveolar macrophages play a key role in clearing debris within the alveoli, the tiny air sacs in the lungs, rather than the larger airways.

Debris Trapped on the Sticky Mucus Lining the Respiratory Airways