Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs.

Choose the correct answer from the following :

To determine the correctness of the statement, let us analyze the respiratory mechanisms of a frog in different environments:

1. Respiration in Water:
When a frog is in water, it performs respiration exclusively through its moist skin. This process is known as cutaneous respiration. Dissolved oxygen in the water diffuses directly through the skin into the blood vessels. The buccal cavity and lungs are not used for respiration while the frog is submerged. Therefore, the assertion that frogs respire in water by "skin and buccal cavity" is false.

2. Respiration on Land:
When a frog is on land, it can respire using three different pathways:
- Cutaneous respiration: Through its moist skin.
- Buccopharyngeal respiration: Through the moist lining of the buccal cavity.
- Pulmonary respiration: Through the lungs.
Therefore, the assertion that frogs respire on land by "skin, buccal cavity and lungs" is true.

Combining these two analyses, the statement is false for water but true for land.