what will happen if you damage your cilia in the tranchea
It's trachea, not tranchea xD If your cilia which is located in your trachea got damaged, you will get sick easily. The reason is that the cilia helps protects you from bacteriam by keeping bacteria from getting down into your throat. The cilia getting damaged is most common in smokers due to cigarette smoking, btw.
The cilia is your protection that keeps things from going down the trachea