The circular folds (also known as valves of Kerckring, valves of Kerchkring, plicae circulares, plicae circulae, and valvulae conniventes) are large valvular flaps projecting into the lumen of the small intestine.

The longitudinal fold of duodenum is a fold of mucosa caused by the impression of the pancreatic duct and bile duct on the medial wall of the descending part of the duodenum above the major duodenal papilla.

The first part of the small intestine is the duodenum, and its structure is similar to that seen elsewhere in the small intestine, with some differences. The villi are broader, Peyers Patches are less common, and it has one unique feature: Brunner's glands , which are found in …

The plica longitudinalis corresponds to the intraduodenal portion of the common bile duct, it windens as it approaches the papilla and ends in a bulging transverse

Plica longitudinalis: It is a vertical tortuous fold of the mucous membrane extending downward from the major duodenal papilla. Horizontal (third) part. It extends from the inferior duodenal flexure to the front of the aorta (L3). The relations of the horizontal (third) part of the duodenum is;

Mar 4, 2021 · The valvulae conniventes, also known as Kerckring folds / valves, plicae circulares or just small bowel folds, are the mucosal folds of the small intestine, starting from the second part of the duodenum, they are large and thick at the jejunum and considerably decrease in size distally in the ileum to disappear entirely in the distal ileal bowel...

Arch of plica semicircularis: The plica semicircularis creates an arch above the major duodenal papilla like a hood (cf. monk’s hood). Plica longitudinalis: It’s a vertical tortuous fold of the mucous membrane going downward from the major duodenal papilla.

Mar 6, 2025 · Location: They start in the second part of the duodenum and are most prominent in the jejunum. They gradually decrease in size and number as they progress through the ileum, eventually disappearing. Function: Plicae circulares significantly increase the surface area of the small intestine, enhancing nutrient absorption. They also slow the ...

These folds, known as plicae circulares, are approximately 5 to 6 cm (2 inches) long and about 3 mm (0.1 inch) thick. Plicae circulares are present throughout the small intestine except in the first portion, or bulb, of the duodenum, which is usually flat and smooth, except for a… Read More

a fold of mucosa on the medial wall of the descending part of the duodenum above the major duodenal papilla, probably caused by the relation to the common bile duct. Synonym(s): plica longitudinalis duodeni [TA]