Peyer’s patches

Definition

Peyer's patches are small masses of lymphatic tissue found in the ileum region of the small intestine. They play a crucial role in monitoring intestinal bacteria populations and preventing the growth of pathogenic bacteria.

5 Must Know Facts For Your Next Test

1. Peyer's patches contain immune cells such as B cells, T cells, and macrophages.
2. They are part of the gut-associated lymphoid tissue (GALT).
3. Peyer's patches help generate an immune response to antigens present in the intestines.
4. They are most numerous in the distal part of the ileum.
5. Dysfunction or damage to Peyer's patches can lead to increased susceptibility to intestinal infections.

Review Questions

• What types of immune cells are found in Peyer's patches?
• How do Peyer's patches contribute to intestinal immunity?
• Where in the digestive tract are Peyer's patches most commonly located?

Related terms

Gut-Associated Lymphoid Tissue (GALT): A collection of lymphoid tissue in the gastrointestinal tract that includes Peyer's patches and other lymphoid follicles.

B Cells:

A type of white blood cell that matures into plasma cells to produce antibodies.

Ileum:

The third portion of the small intestine where Peyer's patches are predominantly found.