The nerves that innervate mouth parts and locomotor organs originate form 

Options

A. brian
B. abdominal ganglion
C. prothoracic ganglion
D. sub oesophageal ganglion

Answer

To answer the question about where the nerves that innervate mouth parts and locomotor organs originate from, we can follow these steps:

### Step 1: Understand the Nervous System of Cockroach
The nervous system of the cockroach is divided into three main parts:
1. Supraesophageal ganglion (brain)
2. Subesophageal ganglion
3. Nerve cord

### Step 2: Identify the Role of Each Ganglion
- **Supraesophageal Ganglion**: This part is responsible for supplying nerves to the antennae and compound eyes.
- **Subesophageal Ganglion**: This ganglion is crucial for the coordination of mouth parts and muscle movements.
- **Nerve Cord**: This structure runs along the length of the body and is involved in transmitting signals throughout the body.

### Step 3: Focus on Mouth Parts and Locomotor Organs
The mouth parts of the cockroach include:
- Labrum
- Mandibles
- Maxillae
- Labium

Locomotor organs refer to the legs and other structures involved in movement. Both of these are coordinated by the nervous system.

### Step 4: Determine the Origin of the Nerves
The nerves that innervate both the mouth parts and locomotor organs originate from the **Subesophageal Ganglion**. This ganglion coordinates the movements necessary for both feeding and locomotion.

### Conclusion
Thus, the correct answer to the question is that the nerves that innervate mouth parts and locomotor organs originate from the **Subesophageal Ganglion**.

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