Question

Which of these are the respiratory devices found in adult frogs?
i) Skin
ii) Gills
iii) Book lungs
iv) Lungs
v) Buccopharyngeal cavity

• A. I, IV, and V only
• B. I and IV only
• C. I, II, and III only
• D. IV only

Answer 1

The correct option is A I, IV, and V only

Frog belongs to the class Amphibia which can utilize both free oxygen and dissolved oxygen. It has three different types of respirations i.e. cutaneous, buccopharyngeal, and pulmonary.
Cutaneous respiration is carried out in frogs in which the gaseous exchange happens through their moist skin. During hibernation and aestivation, it is the only mode of respiration. Buccopharyngeal respiration happens with the help of the buccopharyngeal cavity via the nasal chamber and external nares when the frog is on land or partially immersed in water. Pulmonary respiration is the type of respiration in frogs which occurs with the help of the lungs.
Gills are present in aquatic arthropods such as crayfish and prawns, molluscs, and fishes. Internal gills are also found in the tadpole larvae of the frog. Book lungs are found in spiders and scorpions.