Peyer's patch
Peyer's Patches[edit | edit source]
Peyer's patches are small masses of lymphatic tissue found throughout the ileum region of the small intestine. They form an important part of the immune system by monitoring intestinal bacteria populations and preventing the growth of pathogenic bacteria in the intestines.
Structure[edit | edit source]
Peyer's patches are organized lymphoid follicles, similar to lymph nodes, and are located in the mucosa and extending into the submucosa of the ileum. They are covered by a specialized epithelium that contains M cells which are involved in the uptake and transport of antigens from the intestinal lumen.
Function[edit | edit source]
The primary function of Peyer's patches is to facilitate the generation of the immune response within the mucosa. They contain a variety of immune cells, including B cells, T cells, and dendritic cells. These cells work together to produce antibodies and initiate immune responses against pathogens that enter the gut.
Development[edit | edit source]
Peyer's patches develop during fetal life and continue to mature after birth. They are most prominent in young individuals and tend to decrease in number and size with age. The development and maintenance of Peyer's patches are influenced by the gut microbiota and dietary factors.
Clinical Significance[edit | edit source]
Peyer's patches play a crucial role in the immune surveillance of the intestinal tract. They are involved in the pathogenesis of several diseases, including inflammatory bowel disease and gastrointestinal infections. Understanding the function and regulation of Peyer's patches can provide insights into the treatment of these conditions.
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