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Frog has lungs as its main respiratory organs but during hibernation & aestivation and when in water it respires through skin.

1. Frog has lungs as its main respiratory organs but during hibernation & aestivation and when in water it respires through skin.
2. The very thin alveolar wall (about 0.0001 mm) is composed of moist, non-ciliated, squamous epithelial cells.
3. Intercostal muscles (external intercostal and internal intercostal) are attached with the ribs which help in the movement of rib cage during breathing.
4. Vital capacity of lungs is the largest possible expiration after largest possible inspiration that is greatest. Volume of air can be exchanged in single respiration or amount of air breathed in and out with greatest possible efforts.

Correct answer: Frog has lungs as its main respiratory organs but during hibernation & aestivation and when in water it respires through skin.

Solution

Frogs have a unique respiratory system that allows them to breathe through their skin when in water or during periods of hibernation and aestivation.

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