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OpenStudy (anonymous):

In the lungs of smokers, a process called metaplasia occurs where the normal lining cells of the lungs are replaced by squamous metaplastic cells (many layer of squamous epithelial cells). Functionally, why is this an undesirable body reaction to tobacco smoke?

OpenStudy (anonymous):

The replacement squamous cells cannot secrete and do not have cilia, impairing lung function

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