Correct order of excretory organs in Cockroach, Earthworm and Rabbit respectively

Options

A. Skin, Malpighi tubules, kidney
B. Malpighi tubules, Nephridia, kidney
C. Nephridia, Malpighi tubules, kidney
D. Nephridia, kidney, green gland

Answer

To solve the question regarding the correct order of excretory organs in Cockroach, Earthworm, and Rabbit respectively, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Excretory Organ in Cockroach**:
- The excretory organ in Cockroach is called **Malpighian tubules**. These are responsible for the removal of nitrogenous waste in the form of uric acid.

2. **Identify the Excretory Organ in Earthworm**:
- In Earthworms, the excretory organ is known as **nephridia**. These structures help in the excretion of waste products and regulation of water balance.

3. **Identify the Excretory Organ in Rabbit**:
- Rabbits, being mammals, have **kidneys** as their excretory organs. The kidneys filter blood and produce urine, which is then excreted from the body.

4. **Compile the Information**:
- Now that we have identified the excretory organs for each organism, we can summarize:
- Cockroach: Malpighian tubules
- Earthworm: Nephridia
- Rabbit: Kidneys

5. **Determine the Correct Order**:
- The correct order of excretory organs in Cockroach, Earthworm, and Rabbit is:
- **Malpighian tubules (Cockroach), Nephridia (Earthworm), Kidneys (Rabbit)**.

6. **Select the Correct Option**:
- Based on the options provided, the correct answer is option number 2: **Malpighian tubules, Nephridia, Kidneys**.

### Final Answer:
The correct order of excretory organs in Cockroach, Earthworm, and Rabbit respectively is: **Malpighian tubules, Nephridia, Kidneys**.

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