Peyer's patch

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Peyer's Patch

Peyer's patches (pronounced: /ˈpaɪərz ˈpætʃɪz/) are small masses of lymphatic tissue found throughout the ileum region of the human small intestine. They are named after the 17th-century Swiss anatomist Johann Conrad Peyer.

Etymology

The term "Peyer's patches" is derived from the name of Johann Conrad Peyer, who first described these lymphoid nodules in his work "Exercitatio Anatomica de Glandulis Intestinali", published in 1677.

Function

Peyer's patches play a crucial role in the immune system, specifically in the immune surveillance of the intestinal lumen and in the facilitation of the generation of the immune response within the mucosa.

Structure

Peyer's patches are oval or round lymphoid follicles located in the mucous membrane lining the small intestine, particularly in the ileum. They are part of the Gut-associated lymphoid tissue (GALT) and are composed of B cells, T cells, macrophages, and dendritic cells.

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