In the respiratory tract, columnar epithelium has cilia, which move to push mucus forward and help clear it from the airways.
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Columnar epithelium is found in the inner lining of the intestine, where it facilitates absorption and secretion across the epithelial barrier.
It is referred to as stratified squamous epithelium because the cells are arranged in multiple layers, providing protection against wear and tear.
The skin is made up of stratified squamous epithelium, where cells are arranged in many layers to prevent wear and tear.
Squamous epithelium can also be found in the lining of the esophagus, the lining of the mouth, and as part of the skin.