Bronchitis involves inflammation of which organ system?

• A. Digestive system
• B. Circulatory system
• C. Respiratory system
• D. Endocrine system

Answer: (C)

Bronchitis is an inflammation of the airways in the lungs, specifically the bronchial tubes, which are part of the respiratory system. This system is responsible for breathing—bringing in oxygen and removing carbon dioxide. So the inflammation affects the pathways that carry air to the lungs, not the organs involved in digesting food, pumping blood, or regulating hormones. The digestive system handles nutrients, the circulatory system moves blood, and the endocrine system uses glands to control hormones. That’s why bronchitis is categorized under the respiratory system.