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.

Also called plica circulares, or circular folds, are deep ridges in the mucosa and submucosa. Beginning near the proximal part of the duodenum and ending near the middle of the ileum, these folds facilitate absorption.

Nov 3, 2023 · Circular folds (valves of Kerckring, plicae circulares) are the transverse folds of mucosa found predominantly in the distal duodenum and proximal jejunum; Intestinal villi are fingerlike extensions of intestinal mucosa which project into the lumen of the small intestine. Between the villi are intestinal glands (crypts of Lieberkuhn) which ...

Mar 2, 2024 · The plicae circulares, also known as the circular folds of the small intestine play an important role in nutrient absorption. This article aims to discuss plicae circulares, exploring their function, importance, and impact on digestion and nutrient absorption.

The circular folds retard the passage of the food along the intestines, and afford an increased surface for absorption.

The plicae circulares, or circular folds, of the small intestine are represented histologically as long, finger-like projections of mucosa and underlying submucosa. You might find these chapters and articles relevant to this topic.

Circular folds. Also called a plica circulare, a circular fold is a deep ridge in the mucosa and submucosa. Beginning near the proximal part of the duodenum and ending near the middle of the ileum, these folds facilitate absorption. Their shape causes the chyme to spiral, rather than move in a straight line, through the small intestine.

Sep 14, 2021 · These features, which increase the absorptive surface area of the small intestine more than 600-fold, include circular folds, villi, and microvilli (Figure 20.9). These adaptations are most abundant in the proximal two-thirds of the small intestine, where the majority of …

5 days ago · The interior walls of the small intestine are tightly wrinkled into projections called circular folds that greatly increase their surface area. Microscopic examination of the mucosa reveals that the mucosal cells are organized into finger-like projections known as villi, which further increase the surface area.

Jan 7, 2025 · Circular folds are permanent folds of the mucosa and submucosa in the small intestine. They spiral down the length of the small intestine, and increase the surface area for absorption of nutrients. Circular folds are most prominent in the jejunum, where they are about 8 …