The blood vessels in earthworm are

Options

A. Different in last 15 segments
B. Different in first 13 segments
C. Same throughout
D. Different in middle segments

Answer

To answer the question "The blood vessels in earthworm are," we need to analyze the structure and arrangement of blood vessels in an earthworm. Here’s a step-by-step solution:

### Step 1: Identify the Types of Blood Vessels
Earthworms possess three main types of blood vessels:
1. Dorsal vessel
2. Lateral esophageal vessels
3. Ventral vessel

### Step 2: Locate the Position of Each Blood Vessel
- The **dorsal vessel** is located at the fifth segment of the earthworm.
- The **lateral esophageal vessels** are found between the sixth and seventh segments.
- The **ventral vessel** is present at the ninth segment.
- Additional vessels can be found in the segments towards the end, specifically around the sixteenth segment.

### Step 3: Analyze the Distribution of Blood Vessels
From the information gathered, the blood vessels are not uniform throughout the body of the earthworm. Instead, they vary in position across different segments:
- The dorsal vessel is consistent in its position but is different from the ventral vessel.
- The lateral esophageal vessels are also distinct and located in specific segments.
- The arrangement indicates that blood vessels are different in the middle segments of the earthworm.

### Conclusion
Based on the analysis, the correct answer to the question is that the blood vessels in earthworms are **different in the middle segment**.

### Final Answer:
The blood vessels in earthworm are different in the middle segment.

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