In earthworm, the anterior loops are situated in

Options

A. 4th and 5th segments
B. 6th and 8th segments
C. 10th and 11th segments
D. 12th and 13th segments.

Answer

To determine where the anterior loops are situated in an earthworm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Earthworm**:
- Earthworms have a segmented body, which is divided into numerous segments. Each segment has specific structures and functions.

2. **Identify the Anterior Loops**:
- The anterior loops in earthworms refer to certain vascular structures. These loops are characterized as non-muscular, non-valvular, and non-pulsatile.

3. **Locate the Segments**:
- The question provides four options regarding the segments where the anterior loops are located:
- Option 1: 4th and 5th segment
- Option 2: 6th and 8th segment
- Option 3: 10th and 11th segment
- Option 4: 12th and 13th segment

4. **Recall the Position of Anterior Loops**:
- It is known that the anterior loops consist of two pairs of vessels. One pair is located in the 10th segment and the other pair is located in the 11th segment.

5. **Select the Correct Option**:
- Based on the information, the correct answer is that the anterior loops are situated in the 10th and 11th segments. Therefore, the correct option is Option 3.

### Final Answer:
The anterior loops in earthworm are situated in the **10th and 11th segments**.

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