NEET BIOLOGY

Detailed explanation-1: -Overview. The bronchus in the lungs are lined with hair-like projections called cilia that move microbes and debris up and out of the airways. Scattered throughout the cilia are goblet cells that secrete mucus which helps protect the lining of the bronchus and trap microorganisms.

Detailed explanation-2: -Each breath exposes the lungs to the outside environment, which contains pollution and germs, posing a threat to our health. The first line of defense is called the mucociliary escalator: mucus traps the potentially dangerous material and cilia push that material up and out of our airways.

Detailed explanation-3: -Mucus has an important role in your lung’s immune response because it traps irritants in your airways and helps allow your body to expel them through coughing. This helps protect you from infection.

Detailed explanation-4: -Cilia propel a liquid layer of mucus that covers the airways. The mucus layer traps pathogens (potentially infectious microorganisms) and other particles, preventing them from reaching the lungs.