Crypts of Lieberkuhn are present in

Options

A. Pancreas and secrete pancreatic juice
B. Small intestine and secrete digestive enzymes
C. Stomach and secrete dilute HCI
D. Stomach and secrete trypsin

Answer

**Step-by-Step Text Solution:**

1. **Understanding Crypts of Lieberkuhn**: The Crypts of Lieberkuhn are simple tubular glands located in the intestinal lining.

2. **Location**: These crypts are specifically found throughout the small intestine, situated between the villi. Villi are small, finger-like projections that increase the surface area for absorption.

3. **Function**: The primary role of the Crypts of Lieberkuhn is to secrete digestive enzymes and mucus, which aid in the digestion and absorption of nutrients.

4. **Cell Types**: Within the Crypts of Lieberkuhn, there are two main types of cells:
- **Paneth Cells**: These cells are located primarily in the duodenum (the first part of the small intestine) and are known for their role in secreting lysozyme, an enzyme that helps in breaking down bacterial cell walls. They are rich in zinc and contain acidophilic granules.
- **Argentaffin Cells**: Also known as enterochromaffin cells, these are found among the epithelial cell lining of the crypts. They secrete hormones and 5-hydroxytryptamine (serotonin), which play roles in regulating intestinal motility and other functions.

5. **Conclusion**: Therefore, the final answer is that the Crypts of Lieberkuhn are present in the small intestine, specifically located between the villi, and they play a crucial role in digestion by secreting enzymes and mucus.

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