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.
Simple squamous epithelial cells are extremely thin and flat, forming a delicate lining that facilitates the transportation of substances.
Simple squamous epithelial cells line blood vessels and lung alveoli, allowing transportation of substances through a selectively permeable surface.