human
How do crocodiles breathe?
assistant
Crocodiles have a unique breathing system that allows them to stay submerged in water for long periods of time. They have lungs with two chambers, one filled with air and the other filled with water. The crocodile can control the amount of air or water it takes in by opening and closing its mouth. This is called buccal pumping. When the crocodile needs more oxygen, it will open its mouth wide and take in as much air as possible. It then closes its mouth and pumps the water out through its gills.