Describe the structure and function of different types of epithelial tissues. Draw diagram of each type of epithelial tissue.

Explanation

### Step-by-Step Solution

**Step 1: Introduction to Epithelial Tissue**
- Epithelial tissue is one of the four main types of tissues in the animal body. It consists of closely packed cells that form a protective covering or lining for organs and cavities.

**Step 2: Classification of Epithelial Tissue**
- Epithelial tissues can be classified into two main categories:
1. **Simple Epithelium**: Composed of a single layer of cells.
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