The function of typhlosole in earthworm to:-

Options

A. Secrete digestive juice
B. Slows down rate of passage of food
C. Increase absorptive area of intestinal epithelium
D. No function

Answer

**Step-by-Step Solution:**

1. **Understanding Typhlosole**: The typhlosole is an internal fold of the intestinal wall in earthworms. It is important to recognize its structure and location within the digestive system.

2. **Function of Typhlosole**: The primary function of the typhlosole is to increase the surface area of the intestinal epithelium. This is crucial for enhancing the absorption of nutrients.

3. **Mechanism of Action**: The typhlosole creates a "tube within a tube" structure. This arrangement allows for more surface area to be available for absorption as the inner tube (typhlosole) runs the entire length of the intestine.

4. **Importance of Increased Surface Area**: By increasing the absorptive area, the typhlosole ensures that digested nutrients can be absorbed more efficiently as they pass through the intestine.

5. **Conclusion**: Therefore, the function of the typhlosole in earthworms is to increase the absorptive area of the intestinal epithelium, facilitating better nutrient absorption.

**Final Answer**: The function of typhlosole in earthworm is to increase the absorptive area of intestinal epithelium.

---