Answer:
The main job of the respiratory system is the interchange of gases among oxygen and carbon dioxide.
Step-by-step explanation:
Since the nose until the lungs, all the organs of the respiratory system are coordinated to take oxygen from the air until the lungs, with help of the diaphragm that goes down when the lungs fill with air, and the diaphragm goes up when the lungs get empty of oxygen and exhale carbon dioxide.
Inside the alveolar cells, the smallest cell inside the lungs, there is a constant exchange among oxygen and carbon dioxide.
The rest of the respiratory organs like the pharynx and larynx, they just move the air, they are the tunnels by which the air passes through.