In the human digestive system, the 'Peyer's patches' are aggregated lymphoid nodules found primarily in the mucosa and submucosa of the: MCQ with Answer and Explanation

Peyer's patches are organized lymphoid follicles (aggregated lymphoid nodules) located in the mucosa and submucosa of the small intestine, most abundantly in the ileum (the distal part). They are a crucial component of the gut-associated lymphoid tissue (GALT) and play a vital role in monitoring intestinal bacteria populations, preventing the growth of pathogenic bacteria, and training the immune system to recognize antigens.