Which of these are excretory organs in cockroach ?

Options

A. Nephridia
B. Malpighian tubules
C. Haerocoel
D. Solenocytes

Explanation

To determine the excretory organs in a cockroach, we will analyze each option provided in the question step by step:

### Step 1: Analyze Nephridia
- Nephridia are known to be excretory organs primarily found in earthworms and some other annelids. They function to filter waste from the body fluids.
- **Conclusion**: Nephridia are not present in cockroaches. Therefore, this option is ruled out.

### Step 2: Analyze Malpighian Tubules
- Malpighian tubules are specialized excretory structures found in insects, including cockroaches. They are located at the junction of the midgut and hindgut.
- There are approximately 150 Malpighian tubules in a cockroach, and they are responsible for the excretion of nitrogenous waste.
- **Conclusion**: Malpighian tubules are indeed the excretory organs of cockroaches.

### Step 3: Analyze Hirosal
- Hirosal refers to the hemocoel, which is the main body cavity in invertebrates, including insects. It serves as a space where blood (hemolymph) circulates and organs are suspended.
- **Conclusion**: Hirosal is a body cavity and not an excretory organ, so this option is ruled out.

### Step 4: Analyze Solenocytes
- Solenocytes are long, narrow, flagellated cells that function as excretory organs in certain invertebrates, particularly in annelids and molluscs.
- They are not found in insects, including cockroaches.
- **Conclusion**: Solenocytes are not present in cockroaches, so this option is also ruled out.

### Final Conclusion
After analyzing all the options, the only excretory organ present in cockroaches is **Malpighian tubules**.

### Summary of the Correct Answer
- The correct answer is **Malpighian tubules**.

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