Blood of cockroach does not contain haemoglobin bacause :

Options

A. it does not respire
B. it respires through book lungs
C. it respires through atmosphere
D. it has some other means to carry oxygen direct into the tissue

Answer

### Step-by-Step Solution:

1. **Understanding the Role of Hemoglobin**:
- Hemoglobin is a protein found in red blood cells that is responsible for transporting oxygen from the lungs to the rest of the body and returning carbon dioxide from the body back to the lungs. It also gives blood its red color.

2. **Identifying the Blood Composition in Cockroaches**:
- The blood of cockroaches is known as hemolymph, which is colorless and does not contain hemoglobin. This is a significant difference from the blood of many other animals, including humans.

3. **Analyzing the Respiratory System of Cockroaches**:
- Cockroaches do not rely on hemoglobin for oxygen transport because they have a unique respiratory system. They respire through structures called spiracles and tracheae, which allow direct exchange of gases with their tissues.

4. **Understanding Why Hemoglobin is Absent**:
- Since cockroaches have a different mechanism for oxygen delivery, hemoglobin is not necessary. The spiracles open to the outside environment, and the tracheae carry oxygen directly to the cells, making the presence of hemoglobin redundant.

5. **Conclusion**:
- Therefore, the correct reason for why the blood of cockroaches does not contain hemoglobin is that they have other means to carry oxygen directly into their tissues, specifically through their spiracles and tracheal system.

### Final Answer:
The blood of cockroach does not contain hemoglobin because it has some other means to carry oxygen directly into the tissue.

---