Circular Folds [Plicae Circulares, Pna, Jna: Plicae Circulares (Kerkringi), Bna; Syn. Kerkringa Fold]

Circular folds, also known as plicae circulares, are folds of the lining of the small intestine that extend around the circumference of the small intestine. They are one of the structures that provide increased surface area for nutrient absorption and absorption of nutrients in the small intestine.

Circular folds can be observed on the inner surface of the small intestine and are protrusions of the mucous membrane that are formed due to the complex anatomy and microstructure of the intestinal wall. They create a characteristic mosaic pattern consisting of many small projections that look like folds or grooves.

The function of the circular folds is to increase the absorptive surface of the small intestine. Due to the presence of folds, food masses passing through the intestines slow down their movement and have more time to interact with the surface of the mucous membrane. This promotes more complete absorption of nutrients and water from food.

In addition, circular folds help enhance the mechanical processing of food. As food masses move through the intestines, the folds compress and relax, which promotes mixing of the contents and more efficient distribution of nutrients.

Circular folds also play an important role in creating certain microflora in the small intestine. They help retain certain microorganisms that may be beneficial for digestion and absorption of certain nutrients.

All these factors make the orbicularis important structures for the normal function of the digestive system. They help ensure efficient absorption of nutrients and support small intestinal health.

In conclusion, the circular folds or plicae circulares are important anatomical structures that provide increased absorptive surface and mechanical processing of food in the small intestine. They play a key role in digestion and ensure optimal absorption of nutrients, which is important for maintaining a healthy body.



Circular folds are a common intestinal condition that is characterized by uneven folds of the mucous membrane. These folds can be found on both the outside and inside of the small intestine.

Circular folds are a common pathology in the small intestine and can be caused by various factors, such as poor diet, gluten intolerance, celiac disease, inflammatory bowel disease, diabetes and others.

People with circles may experience constipation, but sometimes they may stop eating food because it can irritate the mucous membrane. Circles don't hurt. The disease is an abnormal surface of the small intestine due to its structure under the appearance of a smooth membrane, manifested by gastroscopy, colonoscopy or intestinoscopy. It occurs mainly in healthy people.

To diagnose this disease, gastroscopy or colonoscopy is used. In some cases, a biopsy of the small intestine may be required to confirm the diagnosis. Treatment of circular folds