Cilia are 

A. mucus-secreting cells in the lower bronchial tree.
B. tiny structures in the airways that trap and hold foreign material.
C. tiny hair-like structures in the airways that sweep mucus up and out of the lungs.
D. composed of macrophages and destroy inhaled pathogens.


C. tiny hair-like structures in the airways that sweep mucus up and out of the lungs.

Health Professions

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