It traps bacteria and dust.
no
The mucus of the trachea is expelled from the respiratory tract through a process called mucociliary clearance. Cilia, tiny hair-like structures lining the trachea, move the mucus upwards toward the throat. Once it reaches the throat, the mucus can be swallowed or coughed out. This mechanism helps keep the airways clear of dust, pathogens, and other debris.
Trachea's inner lining(lining that faces the hollow side) is comprised of ciliated epithelium which rests on a basement membrane made of protein fibers. In between the ciliates cells the goblet cells are situated. Beneath the epithelium is an area of loos tissue and tracheal glands that secrets mucus (both tracheal glands and goblet cells secrets mucus so don't get confused which one produces mucus). There is a C-Shaped cartilage in outer lining that supports the trachea.
Ciliated epithelium is located in the lining of most body cavities. Some of the cavities that have ciliated epithelium are the lungs, trachea, and nose. Ciliated epithelium serves to keep dust and debris out of the lungs and control the flow of mucus.
Mucus and cilia. The dirt and other impurities that enter the respiratory tract are trapped by the mucus, in order not to enter the lungs and its structures. But the accumulation of too much mucus in the trachea would impede us from breathing, so the cilia sweep the mucus out of the trachea.
The cilia are always moving, bacteria or particles of dust trapped in the mucus are moved away by cilia. The cilia waft the mucus containing bacteria and dust up to the back of the throat, so that it doesn't block up the trachea and thus keeps it clean.
The stomach has a lining of protective mucus.
mucus!!!!!!mucus trap the dirt in the trachea!
Trachea
The cells lining the trachea are specialized cells called ciliated pseudostratified columnar epithelial cells, which have cilia to help move mucus and particles out of the respiratory tract. Animal cells, in general, refer to the basic structural and functional unit of animals, lacking the specialized adaptations seen in cells with specific functions like those found in the tracheal lining.
Helps expell mucus from trachea
Mucus protects stomach lining from gastric acids.