Respiratory organs of scorpions are

Options

A. Lungs
B. Gills
C. Book lungs
D. Ctenidia.

Answer

**Step-by-Step Solution:**

1. **Identify the Phylum**: Scorpions belong to the phylum Arthropoda. This is important as it helps us categorize their anatomical features.

2. **Understand Respiratory Structures in Arthropods**: Arthropods have various types of respiratory organs, which can include gills, tracheae, and book lungs.

3. **Differentiate Between Aquatic and Terrestrial Arthropods**:
- Aquatic arthropods, such as prawns, typically use gills for respiration.
- Terrestrial arthropods, such as scorpions, utilize different structures.

4. **Identify the Respiratory Organ of Scorpions**:
- Scorpions, being terrestrial arthropods, primarily use book lungs for respiration.
- Book lungs are specialized structures that allow for gas exchange in a terrestrial environment.

5. **Eliminate Incorrect Options**:
- Lungs are not the correct answer as they are not present in arthropods.
- Gills are also incorrect since scorpions do not live in aquatic environments.
- Stenidia is not a recognized respiratory structure in scorpions.

6. **Conclusion**: Therefore, the correct answer is that the respiratory organs of scorpions are **book lungs**.

**Final Answer**: The respiratory organs of scorpions are book lungs.

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