Lining of trachea is made up of

Options

A. stratified cililated epithelium
B. pseudostratified ciliated epithelium
C. simple squamous epithelium
D. stratified cubodial epithelium

Answer

To determine what the lining of the trachea is made up of, we can analyze the options provided:

1. **Identify the options**:
- A) Stratified ciliated epithelium
- B) Pseudostratified ciliated epithelium
- C) Simple squamous epithelium
- D) Stratified cuboidal epithelium

2. **Examine the structure of the trachea**:
- The trachea is a part of the respiratory system that conducts air to and from the lungs. It requires a lining that can effectively trap foreign particles and facilitate the movement of mucus.

3. **Evaluate each option**:
- **Option A: Stratified ciliated epithelium**: This type of epithelium has multiple layers and is not typical for the trachea, which requires a single layer for efficient gas exchange and mucus movement.
- **Option B: Pseudostratified ciliated epithelium**: This type of epithelium appears to have multiple layers due to varying cell heights but is actually a single layer. It contains cilia and goblet cells, which produce mucus. This is characteristic of the respiratory tract, including the trachea.
- **Option C: Simple squamous epithelium**: This type consists of a single layer of flat cells and is typically found in areas where diffusion occurs, such as alveoli, but not in the trachea.
- **Option D: Stratified cuboidal epithelium**: This type is found in glandular tissues and does not line the trachea.

4. **Conclusion**:
- The correct answer is **Option B: Pseudostratified ciliated epithelium**. This lining helps in trapping foreign particles and moving mucus out of the airways.

**Final Answer**: The lining of the trachea is made up of **pseudostratified ciliated epithelium**.

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