Peyer's Patches: Location and Immune Function in the Small Intestine

The greatest abundance of lymph nodules, also known as Peyer's patches, is found in the ileum, which is the final portion of the small intestine. Peyer's patches are collections of lymphoid tissue located in the mucosa and submucosa of the ileum and play a crucial role in the immune surveillance and protection against harmful microorganisms and antigens present in the digestive system.