Lungs are supported with sac-like structures in

Options

A. Birds
B. Man
C. Rabbit
D. Amphibians

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks about the presence of sac-like structures that support the lungs in certain organisms.

2. **Identify the Organisms**: The options provided are:
- Option 1: Birds
- Option 2: Man
- Option 3: Rabbit
- Option 4: Amphibians

3. **Analyze the Respiratory System of Each Option**:
- **Birds**: Birds have a unique respiratory system that includes air sacs. These air sacs are sac-like structures that help in storing and moving air through the lungs, allowing for a continuous flow of air and efficient gas exchange, especially during flight.
- **Man (Humans)**: Humans have lungs that contain alveoli, which are small air sacs where gas exchange occurs, but they do not have additional sac-like structures to support the lungs.
- **Rabbits**: Similar to humans, rabbits have lungs with alveoli but lack the additional air sacs found in birds.
- **Amphibians**: Amphibians primarily use lungs and skin for respiration but do not have sac-like structures to support their lungs.

4. **Conclusion**: Based on the analysis, the only organism among the options that has sac-like structures supporting its lungs is birds.

5. **Final Answer**: Therefore, the correct answer is **Option 1: Birds**.

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