Respiratory organs of whale are

Options

A. book lungs
B. lungs
C. gills
D. skin

Answer

### Step-by-Step Solution:

1. **Identify the Class of Whales**: Whales belong to the class Mammalia. This is important because it indicates that they share certain characteristics with other mammals.

2. **Understand the Habitat**: Whales are aquatic animals, meaning they live in water. Despite being aquatic, they are still classified as mammals.

3. **Characteristics of Mammals**: As mammals, whales possess specific features such as giving birth to live young, having a four-chambered heart, and possessing mammary glands to nurse their young.

4. **Respiration in Whales**: Unlike fish that use gills to extract oxygen from water, whales have lungs. This means they must come to the surface of the water to breathe.

5. **Breathing Mechanism**: Whales must regularly surface to inhale atmospheric air into their lungs. If they do not come to the surface frequently, they risk suffocation due to a lack of oxygen.

6. **Conclusion**: Therefore, the respiratory organs of whales are their lungs.

### Final Answer:
The respiratory organs of whales are lungs.

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