- Primary function is to obtain oxygen for use by body's cells & eliminate carbon dioxide that cells produce
- Includes respiratory airways leading into (& out of) lungs plus the lungs themselves
- Pathway of air: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)
Respiratory system
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