What lines the inner wall of the bronchus?
The bronchi are the air passages that branch into the lungs from the trachea. Bronchi have a layer of cells, but all the cells are not the same. Some cells produce mucus. Others have little hairs, called cilia, which beat the mucus up toward the mouth to help get rid of it. The mucus traps foreign particles and the cilia carry them out of the lungs as part of the bodies’ defense mechanism.
