Argentaffin cells in human beings are found in

Options

A. small intestine
B. stomach
C. liver
D. both (a) and (b)

Answer

To answer the question regarding where Argentaffin cells are found in human beings, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Argentaffin Cells**:
- Argentaffin cells are specialized cells that have the ability to reduce silver salts. They are known to secrete certain hormones and neurotransmitters.

2. **Identifying Locations**:
- Argentaffin cells are primarily located in the gastrointestinal tract. Specifically, they are found in the stomach and the small intestine.

3. **Function of Argentaffin Cells**:
- These cells secrete important substances such as histamine and serotonin. Histamine plays a role in dilating blood vessels, while serotonin is involved in regulating various functions in the body.

4. **Exclusion of Other Organs**:
- It is important to note that Argentaffin cells are not found in the liver or other organs outside the gastrointestinal tract.

5. **Conclusion**:
- Based on the information gathered, we can conclude that Argentaffin cells are found in the stomach and the small intestine.

### Final Answer:
Argentaffin cells in human beings are found in the stomach and small intestine.