Keratinized dead layer of skin is made of

Options

A. striatified squamous
B. simple cuboidal
C. simple columnar
D. stratified columnar

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the composition of the keratinized dead layer of skin. This layer is crucial for protection against environmental factors.

2. **Identifying the Type of Epithelium**: The keratinized layer of skin is a type of epithelial tissue. Epithelial tissues can be classified based on the number of cell layers and the shape of the cells.

3. **Types of Epithelial Tissues**: The options provided are:
- Stratified Squamous
- Simple Cuboidal
- Simple Columnar
- Stratified Columnar

4. **Analyzing the Options**:
- **Stratified Squamous Epithelium**: This type consists of multiple layers of cells where the outermost layer is flat (squamous). It is designed for protection, and in the skin, it is keratinized, meaning it contains keratin, a protective protein.
- **Simple Cuboidal Epithelium**: This consists of a single layer of cube-shaped cells. It is not protective and is typically found in glands and ducts.
- **Simple Columnar Epithelium**: This consists of a single layer of tall, column-like cells. It is involved in absorption and secretion, not protection.
- **Stratified Columnar Epithelium**: This consists of multiple layers of column-like cells but is not keratinized and is less common.

5. **Conclusion**: The keratinized dead layer of skin is specifically made up of **Stratified Squamous Epithelium**. This type of epithelium is characterized by multiple layers of flat cells, with the outermost layer being keratinized.

6. **Final Answer**: The correct answer is **Stratified Squamous Epithelium**.

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