What function do the alveolar sacs serve in the respiratory system?

Cool and clean the air before it moves to the capillaries
Warm and clean the air before it moves to the alveoli
Increase surface area for gas exchange with the capillaries
Decrease pathogens in the air before it moves to the alveoli

Question

What function do the alveolar sacs serve in the respiratory system?

 Cool and clean the air before it moves to the capillaries
 Warm and clean the air before it moves to the alveoli
 Increase surface area for gas exchange with the capillaries
 Decrease pathogens in the air before it moves to the alveoli

anonymous · Answer

I have absolutely no idea on this i went through my module looking for the words alveolar sacs and cameup with nothing

anonymous · Answer

The alveoli increase the total surface area of your lungs, which allows more gas exchange to take place. The alveolar membrane helps in diffusing oxygen into the bloodstream, and carbon dioxide to diffuse out of the blood.