Which of the following parts of the alimentary canal helps in providing immunity ?

Options

A. Auerbach's Plexus
B. Meissner's Plexus
C. Peyer's Patches
D. Brunner's glands

Answer

To solve the question "Which of the following parts of the alimentary canal helps in providing immunity?", we can analyze each option provided:

1. **Ayurvedic plexus**: This is not a recognized anatomical structure in the context of the alimentary canal. It seems to be a misnomer or confusion with another term. Therefore, it does not contribute to immunity.

2. **Meissner's plexus**: This is a network of neurons located in the submucosa of the gastrointestinal tract. Its primary function is to control glandular secretions and regulate blood flow in the gut, not directly related to immunity.

3. **Peyer’s patches**: These are specialized lymphoid tissues found in the mucosal layer of the small intestine, particularly in the ileum. They consist of clusters of lymphoid follicles and play a crucial role in the immune response by monitoring intestinal bacteria and preventing the growth of pathogenic bacteria in the intestines. Therefore, they are directly involved in providing immunity.

4. **Brunner's gland**: These are glands located in the duodenum that secrete alkaline mucus to neutralize stomach acid. They do not have a direct role in immunity.

Based on the analysis, the part of the alimentary canal that helps in providing immunity is **Peyer’s patches**.

**Final Answer: Option C - Peyer’s patches.**