Classify and Describe epithelial tissue on the basis of structural Modifications of cells .

Explanation

### Step-by-Step Solution

**Step 1: Introduction to Epithelial Tissue**
Epithelial tissue is a group of cells that forms a protective layer on body surfaces and lines cavities and organs. It can be classified based on various criteria, including structural modifications of the cells.

**Step 2: Classification of Epithelial Tissue**
Epithelial tissue can be classified into four main types based on the structural modifications of the cells:

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