.......... is the part of alimentary canal of cockroach which secretes peritrophic membrane

Options

A. Gizzard
B. Midgut
C. Oespophagus
D. Crop

Answer

To answer the question about which part of the alimentary canal of the cockroach secretes the peritrophic membrane, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Alimentary Canal**: The alimentary canal of a cockroach consists of several parts including the esophagus, crop, gizzard, midgut (mesenteron), and hindgut.

2. **Identify the Function of Each Part**:
- **Esophagus**: Transports food from the mouth to the crop.
- **Crop**: Stores food temporarily.
- **Gizzard**: A muscular structure that grinds food, equipped with chitinous plates for mastication.
- **Midgut (Mesenteron)**: The primary site for digestion and absorption of nutrients.

3. **Focus on the Midgut**: The midgut is crucial because it is where the food is processed further after being ground in the gizzard.

4. **Peritrophic Membrane**: This is a protective layer that surrounds the food bolus in the midgut. It is secreted by the glandular cells located in the inner part of the midgut.

5. **Conclusion**: The part of the alimentary canal of the cockroach that secretes the peritrophic membrane is the **midgut**.

### Final Answer:
The part of the alimentary canal of the cockroach which secretes the peritrophic membrane is the **midgut**.

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