The correct order of structures found in cockroach from dorsal to ventral surface of body

Options

A. Heart to Gut to Nerve cord
B. Gut to Heart to Nerve cord
C. Nerve cord to Gut to Heart
D. Heart to Nerve cord to Gut

Answer

To solve the question regarding the correct order of structures found in a cockroach from the dorsal to the ventral surface of the body, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structures**: The primary structures we need to consider in the cockroach are the heart, gut, and nerve cord.

2. **Locate the Heart**: The heart is located on the dorsal side of the cockroach. It is positioned at the topmost part of the body.

3. **Locate the Gut**: Below the heart, we find the gut. The gut is responsible for digestion and is situated in the middle portion of the body.

4. **Locate the Nerve Cord**: The nerve cord is located on the ventral side of the cockroach. It runs along the belly side and is responsible for transmitting signals.

5. **Arrange the Structures**: Based on the locations identified:
- The heart is first (dorsal).
- The gut is second (middle).
- The nerve cord is last (ventral).

6. **Final Order**: Therefore, the correct order of structures from dorsal to ventral is:
- Heart (dorsal)
- Gut (middle)
- Nerve Cord (ventral)