Epithelium that covers dry surface of skin and moist surface of pharynx respectively are 

Options

A. stratified keratinized squamous and stratified non keratinized squamous
B. stratified non keratinized squamous & stratified keratinized squamous
C. simple cuboidal epithelium
D. simple columnar epithelium

Answer

To answer the question regarding the type of epithelium that covers the dry surface of the skin and the moist surface of the pharynx, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Epithelium**:
- Epithelium is a type of tissue composed of densely packed cells. It can be classified into two main types: simple (single layer) and stratified (multiple layers).

2. **Identify the Specific Types of Stratified Epithelium**:
- Stratified epithelium can be further divided into keratinized and non-keratinized types.
- **Keratinized Stratified Squamous Epithelium**: Contains keratin, a protective protein, and is typically found in areas exposed to the external environment, such as the skin.
- **Non-Keratinized Stratified Squamous Epithelium**: Lacks significant keratin and is found in moist areas that require protection but also need to remain moist, such as the lining of the mouth and pharynx.

3. **Determine the Epithelium for Skin**:
- The dry surface of the skin is covered by **stratified keratinized squamous epithelium**. This type provides protection against environmental factors.

4. **Determine the Epithelium for Pharynx**:
- The moist surface of the pharynx is covered by **stratified non-keratinized squamous epithelium**. This type allows for moisture retention while still providing protection.

5. **Combine the Findings**:
- Therefore, the epithelium that covers the dry surface of the skin is **stratified keratinized squamous epithelium**, and the epithelium that covers the moist surface of the pharynx is **stratified non-keratinized squamous epithelium**.

### Final Answer:
The epithelium that covers the dry surface of the skin and the moist surface of the pharynx respectively are:
- **Stratified keratinized squamous epithelium** (for skin)
- **Stratified non-keratinized squamous epithelium** (for pharynx)

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