Which structure protects the plant body against the invasion of parasites?

Explanation

**Step-by-Step Solution:**

1. **Identify the Structure**: The question asks for the structure that protects the plant body against the invasion of parasites.

2. **Understand Plant Anatomy**: In higher plants, the outermost layer that covers the plant body is known as the epidermis.

3. **Characteristics of the Epidermis**: The epidermis is typically a thin layer, often just one cell thick, composed of elongated and compactly arranged cells that form a continuous sheet over the plant body.

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