Blood glands of Pheretima take part in

Options

A. Formation of red blood corpuscles
B. Formation of phagocytes
C. Maintenance of blood volume
D. Maintenance of blood circulation

Answer

**Step-by-Step Solution:**

1. **Identify the Organism:** The question refers to the blood glands of Pheretima, which is a genus of earthworms.

2. **Locate the Blood Glands:** In Pheretima, blood glands are located on the fourth, fifth, and sixth segments of the body.

3. **Function of Blood Glands:** The primary function of these blood glands is to produce blood cells and hemoglobin.

4. **Nature of Blood Cells:** The blood cells produced by the blood glands are phagocytic in nature, meaning they can engulf and digest pathogens and debris.

5. **Blood Vascular System:** The blood vascular system in Pheretima is a closed type, consisting of blood vessels, hearts, loops, capillaries, and blood glands.

6. **Determine the Correct Answer:** Given that the blood glands produce phagocytic blood cells, the correct answer to the question is that the blood glands take part in the formation of phagocytes.

7. **Eliminate Incorrect Options:**
- Formation of red blood corpuscles is incorrect as other types of cells are also present.
- Maintenance of blood volume and circulation are also not functions of the blood glands.

**Final Answer:** The blood glands of Pheretima take part in the formation of phagocytes.

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