The dorsal plate of skelton found on the abdomen of cockroach is called

Options

A. Pleuron
B. sternum
C. tergum
D. vertex

Answer

To answer the question "The dorsal plate of skeleton found on the abdomen of cockroach is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Cockroach Abdomen**:
- The abdomen of a cockroach consists of 10 segments. Each segment has a specific structure that contributes to the overall anatomy of the cockroach.

2. **Identify the Dorsal and Ventral Regions**:
- The abdomen can be divided into dorsal (upper) and ventral (lower) regions. The dorsal side is the upper part of the abdomen, while the ventral side is the lower part.

3. **Determine the Correct Terminology**:
- The dorsal plate of the skeleton in the abdominal region of the cockroach is specifically referred to as the "tergum."

4. **Understand the Composition of Tergum**:
- The tergum is made up of calcareous plates known as tergites. These plates provide structure and protection to the cockroach.

5. **Differentiate from Other Options**:
- The other options provided (Pleuron, Sternum, Vertex) refer to different parts of the cockroach anatomy:
- **Pleuron**: Refers to the lateral sides of the segments.
- **Sternum**: Refers to the ventral side of the abdomen.
- **Vertex**: Refers to the top part of the head, not the abdomen.

6. **Conclude with the Correct Answer**:
- Therefore, the correct answer to the question is **C, Tergum**.

### Final Answer:
The dorsal plate of the skeleton found on the abdomen of the cockroach is called the **tergum**.

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