Skin

true

Squamous cells are flat and circular shaped. These cells are found in many parts of the body such as the mouth, lips, cervix, and the middle layers of the skin.

Squamous cell carcinoma in-situ arising hypertrophic actinic keratosis with associated cutansous horn is a skin cancer.

In case of chronic smokers you get squamous metaplasia. That prevent outward expulsion of the dust particles and bacteria out of the respiratory tract. That enhances the chances of various dust related lung diseases and infections.