Aggregated lymphatic follicle: in ileum are

Options

A. Peyer's patches
B. Crypts of Lieberkun
C. Argentaffin cells
D. Paneth cells

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the aggregated lymphatic follicles found in the ileum. We need to identify their specific name.

2. **Identifying the Location**: The ileum is the last part of the small intestine, which follows the duodenum and jejunum. It plays a crucial role in the absorption of nutrients.

3. **Recognizing the Structure**: In the ileum, there are specialized structures known as lymphatic follicles. These are important for immune function and help in the body's defense against pathogens.

4. **Naming the Aggregated Lymphatic Follicles**: The aggregated lymphatic follicles in the ileum are specifically known as "Peyer’s patches." They are oval-shaped and play a significant role in the immune response.

5. **Counting the Number**: Typically, there are about 20 to 30 Peyer’s patches present in the ileum.

6. **Eliminating Incorrect Options**: The other options provided (crypts of Lieberkühn, enteroendocrine cells, and Paneth cells) do not refer to the aggregated lymphatic follicles in the ileum and are therefore incorrect.

7. **Conclusion**: The correct answer to the question is that the aggregated lymphatic follicles in the ileum are known as Peyer’s patches.

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