Frogs breathe through their skin and lungs. Unlike humans who only breathe through their lungs, frogs can also absorb oxygen through their skin, which is known as cutaneous respiration.
When a frog is in water, it absorbs oxygen through its skin by diffusion. When on land, the frog uses its lungs to breathe. During inhalation, the frog closes its nostrils and pushes air into its mouth using its throat muscles. The air then flows into the lungs, where oxygen is absorbed into the bloodstream and carbon dioxide is released through exhalation.
Some species of frogs have evolved special adaptations to survive in environments with low oxygen levels, such as developing large lungs or utilizing air pockets in their skin. Overall, the respiratory system of a frog is well adapted to its amphibious lifestyle.
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