Respiratory Organs

Anatomical divisions = upper respiratory tract

Nose, nasal cavity, paranasal sinuses, pharynx

Anatomical divisions = lower respiratory tract

Larynx, trachea, bronchi, bronchioles, alveoli

Functional division = conducting zone

All structures from the nose down to the terminal bronchioles - nasal cavity, pharynx, trachea, bronchi, bronchioles, only passage of air without gas exchange

Functional division = respiratory zone

Where gas exchange occurs - respiratory bronchioles, alveolar ducts, alveoli

Order of respiratory organs

Nasal cavity, pharynx, larynx, trachea, primary bronchus, secondary bronchus, tertius bronchus, bronchiole, terminal bronchiole, pulmonary veins and arteries, alveolar duct, alveolus, capillary network