Septal nephridia of earthwom discharge excretory product into:-

Options

A. Body cavity
B. Pharynx
C. Outside on body surface
D. Lumen of Intestine

Answer

**Step-by-Step Solution:**

1. **Understanding Septal Nephridia**: The septal nephridia are specialized excretory structures found in earthworms. They are responsible for the excretion of waste products from the body.

2. **Location of Septal Nephridia**: These structures are located on either side of the septa (the internal walls) within the earthworm's body. They start appearing from the 15th segment of the earthworm.

3. **Function of Septal Nephridia**: The primary function of septal nephridia is to collect waste materials from the coelomic fluid and other body fluids.

4. **Discharge Mechanism**: The septal nephridia discharge the collected excretory products into a pair of excretory ducts.

5. **Final Destination of Excretory Products**: The excretory ducts lead to the lumen of the intestine. This means that the waste products are ultimately discharged into the intestinal cavity.

6. **Conclusion**: Therefore, the septal nephridia of the earthworm discharge their excretory products into the lumen of the intestine.

**Final Answer**: The septal nephridia of earthworms discharge excretory products into the lumen of the intestine.

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