Gizzard of cockroach is a part of

Options

A. Respiratory system
B. Digestive system
C. Immune system
D. Circulatory system

Answer

**Step-by-Step Solution:**

1. **Understanding the Gizzard**: The gizzard is a muscular organ found in some animals that aids in the mechanical breakdown of food. It is particularly important for organisms that consume hard or fibrous materials.

2. **Identifying the Function**: In the case of the cockroach, the gizzard plays a crucial role in crushing and grinding the food that the cockroach ingests. This mechanical digestion is essential for breaking down food into smaller particles, making it easier for enzymes to act on it during the chemical digestion process.

3. **Locating the Gizzard in Body Systems**: To determine which system the gizzard belongs to, we need to consider the options provided:
- A) Respiratory system: This system is responsible for gas exchange.
- B) Digestive system: This system is responsible for the breakdown and absorption of food.
- C) Immune system: This system protects the body against pathogens.
- D) Circulatory system: This system is responsible for the transport of nutrients and waste.

4. **Conclusion**: Since the gizzard is involved in the mechanical digestion of food, it is classified as part of the digestive system. Therefore, the correct answer is option B, which states that the gizzard of a cockroach is a part of the digestive system.

**Final Answer**: The gizzard of a cockroach is a part of the digestive system (Option B).

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