When irritated by chronic exposure to cigarette smoke,columnar bronchial epithelium changes into stratified squamous epithelium.This change is an example of:

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Metaplasia is the reversible change of one cell type to another under certain conditions. Chronic exposure to cigarette smoke can cause the columnar bronchial epithelium to change into stratified squamous epithelium, which is a type of metaplastic change.

When Irritated by Chronic Exposure to Cigarette Smoke,columnar Bronchial Epithelium