Paneth cells are present in the mucosa between the bases of villi of small intestine (Crypts of Lieberkuhn) . The function of these cells is to secrete antibacterial lysozyme.

So, correct answer is "Paneth cells"...

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Answer:
The crypts of Lieberkhun are located in the small intestine, and they are responsible for secreting various enzymes and substances that aid in digestion and protect the intestinal wall. Among these substances is lysozyme, an antibacterial enzyme that helps to prevent infections in the intestine.

Which cells secrete lysozyme?
The cells that secrete lysozyme in the crypts of Lieberkhun are called Paneth cells. These cells are found at the base of the crypts and are responsible for producing several antimicrobial peptides, including lysozyme. The lysozyme produced by these cells can break down the bacterial cell wall, making it an effective defense against bacterial infections.

What are the functions of Paneth cells?
Paneth cells have several important functions, including:

- Producing lysozyme and other antimicrobial peptides to protect against bacterial infections
- Secreting growth factors that stimulate the growth and differentiation of other cells in the crypts
- Regulating the composition of the intestinal microbiota by producing substances that promote the growth of beneficial bacteria and inhibit the growth of harmful bacteria.

What happens if Paneth cells are damaged?
If Paneth cells are damaged or destroyed, there can be an increased risk of bacterial infections in the intestine. This can lead to inflammation and damage to the intestinal wall, which can cause symptoms such as diarrhea, abdominal pain, and bloating. In some cases, damage to Paneth cells may be associated with inflammatory bowel disease (IBD), a chronic condition that affects the digestive system.

In conclusion, Paneth cells located in the crypts of Lieberkhun secrete antibacterial lysozyme. These cells have several important functions, including protecting against bacterial infections, regulating the intestinal microbiota, and promoting the growth and differentiation of other cells in the crypts. Damage to Paneth cells can lead to an increased risk of bacterial infections and may be associated with inflammatory bowel disease.