The lungs are part of the respiratory and excretory systems.
None.
The lungs are the main organ of the respiratory system, but they are also an organ in the circulatory system.
intestines: Digestive system lungs: Respiratory system
The lungs.
The respiratory system.
The respiratory system. The alveoli are air sacs in the lungs.
The lungs.
Respiratory.
The lungs.
The main organ in the respiratory system the lungs.
The lungs are part of the respiratory system (breathing)
the respiratory system