Trapped dust particles are pushed out of respiratory tract by

Options

A. Squamous epithelium
B. Glandular epithelium
C. Ciliated epithelium
D. Compound epithelium

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about how trapped dust particles are pushed out of the respiratory tract. This indicates a focus on the mechanisms involved in the clearance of dust from the respiratory system.

2. **Identifying the Processes**: There are two main processes involved in dealing with dust particles in the respiratory tract:
- **Trapping the Dust**: This involves capturing dust particles to prevent them from entering deeper into the lungs.
- **Removing the Dust**: This involves pushing the trapped dust particles out of the respiratory tract.

3. **Role of Glandular Epithelium**: The trapping of dust particles is facilitated by mucus, which is produced by glandular epithelium. Mucus traps dust and other particles, preventing them from reaching the lungs.

4. **Role of Ciliated Epithelium**: The removal of the trapped dust particles is accomplished by ciliated epithelium. The cilia are hair-like structures that beat in a coordinated manner to move the mucus (along with trapped dust) upwards towards the throat, where it can be swallowed or expelled.

5. **Conclusion**: Since the question specifically asks about how the trapped dust particles are pushed out, the correct answer is **ciliated epithelium**.

**Final Answer**: Trapped dust particles are pushed out of the respiratory tract by **ciliated epithelium**.

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