Flexi Says: The bronchi in the lungs are lined with hair-like projections called cilia. These ciliated cells move mucus away from the lungs. This mucus catches spores, bacteria, and debris and moves to the esophagus, where it is swallowed. While Flagella are long, thin structures that protrude from the cell membrane. Flagella help single-celled organisms move or swim towards food. The flagella of eukaryotic cells are normally used for movement too, such as in the movement of sperm cells, which have only a single flagellum.
