Hemoglobin is dissolved in the blood plasma of

Options

A. Rabbit
B. Cockroach
C. Earthworm
D. Frog

Answer

**Step-by-Step Solution:**

1. **Understanding 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.

2. **Cockroach Physiology**: Cockroaches belong to the phylum Arthropoda, specifically the class Insecta. Unlike mammals, cockroaches do not have a respiratory system with lungs. Instead, they have a tracheal system that allows for gas exchange.

3. **Role of Blood Plasma**: In cockroaches, hemoglobin is found dissolved in the blood plasma. The blood plasma is the liquid component of blood that carries cells, nutrients, hormones, and waste products.

4. **Gas Exchange Mechanism**: Since cockroaches do not have lungs, they rely on diffusion for gas exchange. The hemoglobin in the plasma assists in the diffusion of oxygen and carbon dioxide through the skin and other surfaces.

5. **Conclusion**: Therefore, hemoglobin is dissolved in the blood plasma of cockroaches to facilitate gas exchange, as they lack a conventional respiratory system.

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