Chloragogen cells in earthworms are specifically meant for excretion.

Explanation:

Chloragogen cells:
- Chloragogen cells are specialized cells found in the connective tissue of earthworms.
- They are typically located in the wall of the digestive system, especially in the region of the intestine.
- These cells are known for their large size and granular appearance.

Functions of chloragogen cells:
1. Excretion:
- The primary function of chloragogen cells is excretion.
- Chloragogen cells are involved in the removal of waste products from the earthworm's body.
- They help in the breakdown and elimination of nitrogenous waste, such as ammonia, which is produced as a result of protein metabolism.
- These cells store and release metabolic waste products from the earthworm's body.

2. Detoxification:
- Chloragogen cells also play a role in detoxification.
- They help in the detoxification of harmful substances that enter the earthworm's body, such as heavy metals and certain chemicals.
- The cells contain enzymes that facilitate the breakdown of these substances, making them less toxic and easier to eliminate.

3. Storage of nutrients:
- Chloragogen cells act as storage sites for nutrients.
- They store glycogen, a polysaccharide that serves as an energy reserve.
- When the earthworm requires energy, the stored glycogen can be broken down and utilized.

4. Immune response:
- Chloragogen cells also have an immune function.
- They are involved in the defense mechanism of the earthworm's body against pathogens.
- The cells produce antimicrobial peptides that help in fighting off bacteria, fungi, and other harmful microorganisms.

In conclusion, chloragogen cells in earthworms are primarily meant for excretion. They play a crucial role in the elimination of waste products, detoxification, nutrient storage, and immune response.