In cockroach, identify the parts of the foregut in correct sequence :-

Options

A. `Mouth rarr Oesophagus rarr Pharynx rarr Crop rarr Gizzard`
B. `Mouth rarr Crop rarr Pharynx rarr Oesophagus rarr Gizzard`
C. `Mouth rarr Gizzard rarr Crop rarr Pharynx rarr Oesophagus`
D. `Mouth rarr Pharynx rarr Oesophagus rarr Crop rarr Gizzard`

Answer

To identify the parts of the foregut in a cockroach in the correct sequence, we need to understand how food travels through this part of the digestive system. The foregut consists of several key structures that play a role in the ingestion and initial processing of food.

### Step-by-Step Solution:

1. **Mouth**: The process begins at the mouth, where the cockroach takes in food from the environment.

2. **Pharynx**: After the mouth, the food moves into the pharynx. The pharynx is a muscular tube that helps in swallowing the food.

3. **Esophagus**: From the pharynx, the food travels down the esophagus. The esophagus is a pipe-like structure that connects the pharynx to the crop.

4. **Crop**: Next, the food enters the crop. The crop serves as a storage area and is involved in the grinding and crushing of food.

5. **Gizzard (Proventriculus)**: Finally, the food moves into the gizzard (also known as the proventriculus). The gizzard further processes the food, helping in its mechanical breakdown before it moves to the midgut.

### Correct Sequence of the Foregut:
- Mouth
- Pharynx
- Esophagus
- Crop
- Gizzard

Thus, the correct answer is **Option D**: Mouth → Pharynx → Esophagus → Crop → Gizzard.