It is mainly caused by bacteria and pathogens in air. It causes the lungs to become filled with fluid (mucus). This build up of fluid and mucus in the lungs stops the exchange of gases. This can cause bad coughing and fever. Along the trachea, cilia work with mucus to trap bacteria and dust particles.
How does the respiratory system protect itself?
- Mucus traps bacteria and dust
- Cilia wafts the mucus containing bacteria into the stomach where the acid kills it
- Macrophages (white blood cells) ingest bacteria
Bronchitis is caused by viruses and bacteria or breathing in…