Question

Aggregates of lymphoid tissue present in distal portion of small intestine is known as:

• A. Villi
• B. Rugae
• C. Choroid plexus
• D. Peyer’s patch

Answer 1

The correct option is D Peyer’s patch

Peyer’s patches are the isolated or aggregated groupings of lymphoid follicles. It is generally found in the ileum of the small intestine. Microfold cells or the M cells are the specialised cells found in the epithelium that covers the Peyer’s patches. They perform various important functions including the regulation of bacterial population in the intestine and prevention of growth of pathogenic bacteria in the intestine. They can be considered as a part of the immune system.

Villi are the small finger-like foldings present in the small intestine. They are formed by the innermost mucosal layer.

Rugae are the irregular folds which are present in the stomach. They are also formed from the innermost mucosal layer.

Choroid plexus are the network of blood vessels which are responsible for producing the cerebrospinal fluid in the ventricles of the brain.