Columnar epithelium is present in :

Options

A. Stomach
B. Intestine
C. Buccal cavity
D. Both (1) and (2)

Answer

**Step-by-Step Solution:**

1. **Understanding Columnar Epithelium**: Columnar epithelium is a type of epithelial tissue characterized by tall, column-like cells. It can be classified into two types: ciliated and non-ciliated (with microvilli).

2. **Identifying Locations**: The question asks where columnar epithelium is present among the given options: stomach, intestine, buccal cavity, or both stomach and intestine.

3. **Columnar Epithelium in the Stomach**: In the stomach, columnar epithelium is present and plays a role in secreting digestive enzymes. This type of epithelium helps in the digestive process.

4. **Columnar Epithelium in the Intestine**: In the intestine, columnar epithelium is also present, specifically with microvilli. This adaptation increases the surface area for absorption and aids in the absorption of digested food.

5. **Columnar Epithelium in the Buccal Cavity**: The buccal cavity (oral cavity) does not contain columnar epithelium. Instead, it is lined with stratified squamous epithelium, which is better suited for protection.

6. **Conclusion**: Since columnar epithelium is present in both the stomach and intestine but not in the buccal cavity, the correct answer is that it is found in both the stomach and intestine.

**Final Answer**: Both stomach and intestine (Option 4).

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