Mark the correct one regarding typhlosole

Options

A. Internal median fold of ventral intestinal wall
B. Extends from `20^(th) -35^(th)` segments
C. Increases the surface area for absorption
D. Decreases the surface area for absorption

Answer

To solve the question regarding typhlosole, we will evaluate each of the provided options step-by-step.

### Step 1: Understanding Typhlosole
Typhlosole is a structure found in the intestines of earthworms. It is an internal fold that plays a significant role in the digestive process.

**Hint:** Remember that typhlosole is associated with the internal structure of the intestine in earthworms.

### Step 2: Evaluating the First Option
The first option states that typhlosole is an "internal median fold of the ventral intestinal wall." This is incorrect because typhlosole is actually an internal fold of the dorsal wall of the intestine, not the ventral wall.

**Hint:** Focus on the location of typhlosole; it is related to the dorsal side of the intestine.

### Step 3: Evaluating the Second Option
The second option claims that typhlosole "extends from the 20th to 35th segments." This is also incorrect. Typhlosole begins from the 26th segment and extends to the 35th segment, not from the 20th.

**Hint:** Pay attention to the specific segments mentioned; typhlosole starts at segment 26.

### Step 4: Evaluating the Third Option
The third option states that typhlosole "increases the surface area for absorption." This statement is correct. The presence of typhlosole increases the surface area of the intestine, facilitating better absorption of nutrients.

**Hint:** Consider the function of typhlosole; it is designed to enhance absorption efficiency.

### Step 5: Evaluating the Fourth Option
The fourth option claims that typhlosole "decreases the surface area for absorption." This is incorrect, as typhlosole actually increases the surface area for absorption, as mentioned earlier.

**Hint:** Think about the role of structures in the digestive system; they typically aim to maximize absorption.

### Conclusion
After evaluating all the options, the correct statement regarding typhlosole is that it "increases the surface area for absorption."

**Final Answer:** Increases the surface area for absorption.