In earthworms, the respiration takes place through

Options

A. Moist skin
B. Gills
C. Lungs
D. Tracheal System

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks about the method of respiration in earthworms. We need to identify the correct respiratory organ from the given options: moist skin, gills, lungs, and tracheal system.

2. **Analyzing the Options:**
- **Moist Skin:** Earthworms have a slimy and moist skin that is permeable to gases. This skin has many pores that facilitate the exchange of gases.
- **Gills:** Gills are typically found in aquatic animals like fish, which extract oxygen from water. Earthworms are not aquatic animals that rely on gills for respiration.
- **Lungs:** Lungs are complex respiratory organs found in mammals, including humans. Earthworms do not possess lungs.
- **Tracheal System:** This system is found in many insects, such as cockroaches, where oxygen enters through spiracles and travels through a network of tubes. Earthworms do not have a tracheal system.

3. **Identifying the Correct Answer:**
Given that earthworms have moist skin that allows for the exchange of gases, the correct answer is **moist skin**. This skin serves as the respiratory organ for earthworms, allowing oxygen and carbon dioxide to diffuse through it.

4. **Conclusion:**
Therefore, the respiration in earthworms takes place through their **moist skin**.

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