Which system is associated with the lungs?

Which system is associated with the lungs?

• A. Digestive system
• B. Respiratory system
• C. Nervous system
• D. Cardiovascular system

Answer: (B)

Breathing and gas exchange are the job of the respiratory system. The lungs are the main organs of this system, bringing in air, allowing oxygen to diffuse into the blood, and releasing carbon dioxide from the blood to be exhaled. This gas exchange occurs in the tiny air sacs called alveoli, surrounded by capillaries. The other systems have different roles: the digestive system handles nutrients, the nervous system controls body functions, and the cardiovascular system circulates blood. So the lungs are associated with the respiratory system.

Breathing and gas exchange are the job of the respiratory system. The lungs are the main organs of this system, bringing in air, allowing oxygen to diffuse into the blood, and releasing carbon dioxide from the blood to be exhaled. This gas exchange occurs in the tiny air sacs called alveoli, surrounded by capillaries. The other systems have different roles: the digestive system handles nutrients, the nervous system controls body functions, and the cardiovascular system circulates blood. So the lungs are associated with the respiratory system.