Which Animals Use Air Sacs to Ventilate Their Lungs

Question

Which animals use air sacs to ventilate their lungs?
A) reptiles
B) horses
C) birds
D) frogs

Accepted Answer

Birds use air sacs to ventilate their lungs, allowing for a more efficient exchange of gases than the lungs of mammals and other animals. This system helps them meet the high oxygen demands of flight.