Mention the function of the Malpighian tubules.

Explanation

### Step-by-Step Solution:

1. **Identify the Organ**: The Malpighian tubules are excretory organs found in certain arthropods, particularly in cockroaches.

2. **Function Overview**: The primary function of Malpighian tubules is to assist in the excretion of nitrogenous waste from the body.

3. **Location**: These tubules are located in the midgut or hindgut region of the cockroach.

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