Question Video: Identifying the Location of Peyer’s Patches in the Human Body Biology • Third Year of Secondary School

Video Transcript

Peyer’s patches are important structures within the human lymphatic system. Where are they found in the body? (A) In the tonsils, (B) in the spleen, (C) in the small intestine, or (D) in the bone marrow.

Here’s a diagram that shows where we can find each of these parts of the body. Peyer’s patches are lymphoid follicles that are involved in developing immune responses associated with the digestive system. The digestive system contains a wide range of bacteria that are mostly beneficial. Peyer’s patches monitor these bacterial populations and detect harmful bacteria that may enter with or in the food that we eat.

If pathogenic bacteria are present, then the Peyer’s patches can mount an immune response to eliminate them. These patches are located in the small intestine. Therefore, the correct answer is (C), in the small intestine.