The Probert Encyclopaedia of Medicine

CILIA

Cilia are tiny hairs which cover the inside of many mucous linings. They are found throughout the body and, by their wave-like motion, they serve to filter and transport particulate material along the surface of the mucosal lining. Respiratory cilia are responsible for helping to filter dust and debris out of inhaled air and transmitting it with mucous to the pharynx to be swallowed. The nasal cavity, pharynx, trachea, and bronchi mucous linings each have these structures.
Research Cilia