The inner layer of gizzard of cockroach is covered by :

Options

A. By cuticle
B. By mucous membrane
C. By endoepithelium
D. By peritrophic membrane

Answer

To answer the question regarding what covers the inner layer of the gizzard of a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Gizzard**:
- The gizzard is part of the digestive system of the cockroach. It plays a crucial role in grinding and crushing food, similar to the function of teeth in other animals.

2. **Identify the Digestive System Components**:
- The cockroach's digestive system consists of several parts: the foregut, midgut, and hindgut. The gizzard is located in the foregut region.

3. **Know the Lining of the Gizzard**:
- The inner lining of the gizzard is important for its function. The gizzard is lined with a protective layer that aids in the mechanical breakdown of food.

4. **Evaluate the Options Given**:
- The options provided are:
- Cuticle
- Mucous membrane
- Endoepithelium
- Peritrophic membrane

5. **Determine the Correct Answer**:
- The foregut and hindgut of the cockroach, including the gizzard, are lined with a tough, chitinous layer known as the cuticle. Therefore, the inner layer of the gizzard is covered by the cuticle.

6. **Final Answer**:
- The correct answer to the question is **cuticle** (option number one).