Your nose, mouth and eyes are obvious entry points for pathogens. However, tears, mucus and saliva contain an enzyme that breaks down the cell wall of many bacteria. Those that are not killed immediately are trapped in mucus and swallowed. Special cells line and protect the nose, throat and other passages within your body. The inner lining of your gut and lungs also produces mucus to trap invading pathogens.
Answer:The mouth, nose, throat, and lungs fight against pathogens by producing mucus. Mucus acts as a barrier that prevents pathogens from entering the tissues of the body.
