Frogs utilize a unique method called positive pressure breathing to inhale and exhale air. This technique is quite different from the negative pressure breathing that many mammals use.
When a frog wants to breathe, it closes its nostrils and lowers the floor of its mouth, expanding the oral cavity. This creates a vacuum that draws air in through the open skin. Once the mouth is filled with air, the frog then closes its mouth and nostrils and pushes the floor of its mouth upwards. This action exerts positive pressure, forcing the air directly into the lungs.
This method of breathing is especially effective for frogs because it allows them to take in a significant amount of air quickly and efficiently, which is vital given their often aquatic or semi-aquatic lifestyles. Additionally, positive pressure breathing helps them adapt to different environments, whether on land or underwater, making it an essential aspect of their survival.