made up of two parts

CONDUCTING ZONE:

Nose,Nasal Cavity,Pharynx,Larynx,Trachea Bronchi,Bronchioles,Terminal Bronchioles

RESPIRATORY ZONE

Respiratory Bronchioles,Alveolar Ducts, Alveoli

Respiration:
Delivers O2 to the Blood
Removes CO2 from the Blood

The conducting zone is the pathway that gets air down to the lungs, while the Respiratory zone is where gas exchange takes place.