The bronchi are part of which body system?

• A. Digestive
• B. Respiratory
• C. Nervous
• D. Circulatory

Answer: (B)

Bronchi are part of the respiratory system. They are the main air passages that carry air from the trachea into the lungs and branch into smaller tubes until reaching the alveoli where gas exchange occurs. This air-conduction role defines their place in the respiratory system, not in digestion, nervous control, or circulation. The other systems handle digestion, neural control, and blood circulation, respectively, but bronchi specifically move and condition air for respiration.