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Peyer's patches: Anatomy and function | Kenhub

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Author: Christina Loukopoulou, MSc • Reviewer: Dimitrios Mytilinaios, MD, PhD Last reviewed: October 30, 2023 Reading time: 2 minutes Peyer’s patches are small clusters of lymphatic tissue found in the wall of the small intestine. Specifically, they reside within the lamina propria and extend into the submucosa of the ileum. Peyer's patches act as the immune system's first line of defense against microbial and dietary antigens. They monitor intestinal microbial populations and can prevent the growth of pathogenic bacteria in the intestines. Peyer’s patches are an important part of the GALT (gut-associated lymphoid tissue), the largest lymphatic organ of the human body containing more than 50% of its lymphocytes. GALT comprises both isolated and aggregated lymphoid follicles. In the case of Peyer's patches, also known as submucous aggregated lymphoid nodules, these are oval in shape and contrary to standard lymph node structure, they are not surrounded by a connective tissue capsule. Pe

Peyer's patches Author: Christina Loukopoulou, MD, MSc • Reviewer: Dimitrios Mytilinaios, MD, PhD Last reviewed: October 30, 2023 Reading time: 3 minutes Recommended video: Introduction to the lymphatic system [14:10] Overview of the anatomy, function and main structures of the lymphatic system. Aggregated lymphoid nodules of ileum (Peyer's patches) Noduli lymphoidei aggregati ilei 1/2 Synonyms: Submucous aggregated lymphoid nodules, Noduli lymphatici aggregati submucosi , show more... Peyer’s patches are small clusters of lymphatic tissue found in the wall of the small intestine . Specificall

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