Ciliated epithelium is a type of bodily tissue that is lined with “ciliated” cells, which are basically cells that have small, hair-like protrusions known as “cilia” that can either help the cells move along the tissue or can help debris and waste move along the surface of the cells. Cilia typically move in one direction in a wavelike
pattern, which allows the cells to sweep away debris, direct the flow of particles, and create a current. Tissues in this category are most common in the nasal and respiratory passageways, and are one of the main reasons mucus flows and carries out dead cells when a person has a cold. They occur in many places, though, including the brain, digestive system, and reproductive tract. Scientists usually categorize this sort of epithelium based on where exactly it is, as well as its main function.
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