Sticky liquid produced by nose and trachea?

The sticky liquid produced by the nose and trachea is called mucus. Mucus is a thick, viscous fluid that helps to protect the respiratory system from infection and irritation. It is produced by the mucous membranes that line the nose, throat, and lungs. Mucus traps dust, pollen, and other particles that are inhaled, and it also contains antibodies that help to fight off infection.