Intestinal caeca of Earthworm lie between

Options

A. 22 - 26 segments
B. 20 - 24 segments
C. 14 -16 segments
D. 33 - 36 segments

Answer

To determine where the intestinal caeca of the earthworm lies, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Starting Point of the Intestine**:
- The intestine of the earthworm begins at the 15th segment.

2. **Locate the Intestinal Caeca**:
- The intestinal caeca are short, conical projections that extend from the intestine. They are specifically located in the 26th segment.

3. **Understand the Role of Typhlosole**:
- The typhlosole is an internal medial fold of the dorsal wall of the intestine that helps increase the surface area for absorption. It is also found in the 26th segment.

4. **Determine the Range of Segments for Intestinal Caeca**:
- The intestinal caeca lies between the 22nd segment and the 26th segment. This means they do not extend beyond the 26th segment.

5. **Evaluate the Options**:
- Given the options:
- 1st: 22nd to 26th segments
- 2nd: 20-24 segments
- 3rd: 14-16 segments
- 4th: 33-36 segments
- The first option (22nd to 26th segments) is the only one that correctly identifies the range where the intestinal caeca are located.

### Final Answer:
The intestinal caeca of the earthworm lie between the **22nd and 26th segments**.

---