.......... 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 regarding which part of the alimentary canal of a cockroach secretes the peritrophic membrane, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Parts of the Alimentary Canal**: The alimentary canal of a cockroach consists of several parts including the esophagus, crop, gizzard, and midgut.

2. **Understand the Function of Each Part**:
- **Esophagus**: This is primarily a food pipe that connects the mouth to the stomach, facilitating the passage of food.
- **Crop**: This is a storage organ where food is kept before it moves to the next part of the canal.
- **Gizzard**: This organ is responsible for grinding food, aiding in the mechanical breakdown of food particles.
- **Midgut**: This is the part of the alimentary canal where digestion and absorption primarily occur.

3. **Focus on the Midgut**: The midgut is known for its role in digestion and is specifically responsible for secreting the peritrophic membrane. This membrane surrounds the food bolus, aiding in the digestion process by providing a protective layer.

4. **Conclusion**: Based on the functions of these parts, the correct answer to the question is the **Midgut**, as it is the part of the alimentary canal that secretes the peritrophic membrane.

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