Peyer's patches
Peyer's Patches
Peyer's patches (pronounced: /ˈpaɪərz ˈpætʃɪz/) are small masses of lymphatic tissue found throughout the ileum region of the small intestine. Also known as aggregated lymphoid nodules, they form an important part of the immune system by monitoring intestinal bacteria populations and preventing the growth of pathogenic bacteria in the intestines.
Etymology
The term "Peyer's patches" is named after the 17th-century Swiss anatomist Johann Conrad Peyer.
Function
Peyer's patches are part of the Gut-associated lymphoid tissue (GALT) and play a key role in the immune response. They contain specialized cells called M cells that take up antigens from the lumen of the gut and deliver them to the underlying lymphoid tissue. Here, the antigens are presented to B cells and T cells to stimulate an immune response.
Related Terms
- M cells: Specialized cells in Peyer's patches that transport antigens from the gut lumen to immune cells.
- B cells: A type of white blood cell that produces antibodies against antigens.
- T cells: A type of white blood cell that plays a central role in cell-mediated immunity.
- Gut-associated lymphoid tissue (GALT): A component of the mucosa-associated lymphoid tissue (MALT) which works in the immune system to protect the body from invasion in the gut.
See Also
External links
- Medical encyclopedia article on Peyer's patches
- Wikipedia's article - Peyer's patches
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