Which of the following structures are found in 7 and 9 segments of Pheretima:-

Options

A. Pharyngeal nephridia
B. Lateral Hearts
C. Spermatheca
D. Lateral Oesophageal Hearts

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks about the structures found in the 7th and 9th segments of Pheretima (earthworm).

2. **Understand the Structure of Pheretima**: Pheretima, commonly known as the earthworm, has a segmented body. Each segment can have specific structures that serve various functions.

3. **Locate the Relevant Segments**: The question specifically mentions segments 7 and 9. It is important to focus on the anatomical features present in these segments.

4. **Identify the Structures in Segments 7 and 9**:
- In segments 7 and 9 of Pheretima, the structures present are known as "lateral hearts."
- These lateral hearts are responsible for pumping blood and connecting the dorsal and ventral blood vessels.

5. **Clarify the Function of the Structures**: The lateral hearts in segments 7 and 9 contract and relax to pump blood throughout the body, ensuring proper circulation.

6. **Conclusion**: Based on the above analysis, the correct answer to the question is "lateral hearts."

**Final Answer**: The structures found in the 7th and 9th segments of Pheretima are lateral hearts.

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