Write the fuctions of compound epithelium.

Answer

### Step-by-Step Solution:

1. **Definition of Compound Epithelium**:
- Compound epithelium is a type of epithelial tissue that consists of multiple layers of cells. This multi-layered structure allows it to perform specific functions effectively.

2. **Main Functions of Compound Epithelium**:
- **Protection**: The primary function of compound epithelium is to provide protection. It acts as a barrier against mechanical stress, chemical exposure, and pathogens.
- **Absorption**: Although its role in absorption is limited compared to simple epithelium, compound epithelium can still facilitate some absorption of substances.
- **Secretion**: Compound epithelium also plays a role in secretion, particularly in glands where it lines the ducts.

3. **Locations of Compound Epithelium**:
- Compound epithelium is found in various parts of the body, including:
- **Buccal Cavity**: It lines the mouth, providing protection against abrasion from food.
- **Pharynx**: It helps protect the throat area from pathogens and physical damage.
- **Inner Lining of Ducts**: It is present in the ducts of salivary glands, aiding in the secretion of saliva.

### Summary of Functions:
- **Protection against stress and chemicals**
- **Limited absorption**
- **Secretion in glands**

---