Which types of nervous system is found in flat worms?

Explanation

### Step-by-Step Solution:

1. **Identify the Organism**: The question asks about the nervous system found in flatworms, which belong to the phylum Platyhelminthes.

2. **Understand the Nervous System Structure**: Flatworms possess a unique type of nervous system known as a "ladder-like" nervous system. This structure is characterized by two main longitudinal nerve cords that run along the length of the body.

3. **Describe the Components**: The ladder-like nervous system consists of:
- **Central Nervous System (CNS)**: This is the main nerve cord that runs along the body.
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