The circular folds (also known as valves of Kerckring, valves of Kerchkring, plicae circulares, plicae circulae, and valvulae conniventes) are large valvular...

duodenum to the ileum. It is about 2.5 m (8 ft) long, and contains the circular folds, and intestinal villi that increase its surface area. Products of digestion...

many large circular folds in its submucosa called plicae circulares that increase the surface area for nutrient absorption. The plicae circulares are best...

of its lumen is smaller and has thinner walls than the jejunum. Its circular folds are smaller and absent in the terminal part of the ileum. While the...

single villus. The intestinal villi are much smaller than any of the circular folds in the intestine. Villi increase the internal surface area of the intestinal...

The transverse folds of rectum (or Houston's valves or the valves of Houston) are semi-lunar transverse folds of the rectal wall that protrude into the...

circular folds of the small intestine, and the haustra do not reach around the entire circumference of the intestine, in contrast to circular folds of...

The combination of the circular folds, the villi, and the microvilli increases the absorptive area of the mucosa about 600-fold, making a total area of...

circular folds, flaps of doubled mucosal membrane which partially encircle and sometimes completely encircle the lumen of the intestine. These folds together...

during digestion. Gastric folds may be seen during esophagogastroduodenoscopy or in radiological studies. The gastric folds consist of two layers: Mucosal...

columnar epithelium features longitudinal folds or elevations of tunica mucosa which are joined inferiorly by folds of mucous membrane known as anal valves...

have given a frequency of 1 in 100,000). Sometimes there is a semi-circular fold of mucous membrane at the opening of the appendix. This valve of the...

gastrointestinal tract, excluding the mouth Upper Lower Wall Serosa / Adventitia Subserosa Muscular layer Submucosa Circular folds Mucosa Muscularis mucosa...

gastrointestinal tract, excluding the mouth Upper Lower Wall Serosa / Adventitia Subserosa Muscular layer Submucosa Circular folds Mucosa Muscularis mucosa...

gastrointestinal tract, excluding the mouth Upper Lower Wall Serosa / Adventitia Subserosa Muscular layer Submucosa Circular folds Mucosa Muscularis mucosa...

elevates the mucous membrane. Two folds arise from the cartilaginous opening: the salpingopharyngeal fold, a vertical fold of mucous membrane extending from...

which control defecation.: 397  The anus is surrounded in its length by folds called anal valves, which converge at a line known as the pectinate line...

from the splanchnopleure. This cavity is divided and demarcated by the folding and development of the embryo, ultimately forming the serous cavities which...

gastrointestinal tract, excluding the mouth Upper Lower Wall Serosa / Adventitia Subserosa Muscular layer Submucosa Circular folds Mucosa Muscularis mucosa...

gastrointestinal tract, excluding the mouth Upper Lower Wall Serosa / Adventitia Subserosa Muscular layer Submucosa Circular folds Mucosa Muscularis mucosa...

gastrointestinal tract, excluding the mouth Upper Lower Wall Serosa / Adventitia Subserosa Muscular layer Submucosa Circular folds Mucosa Muscularis mucosa...

tissue, surrounded by a muscularis propria of two bands of muscle, an inner circular band and an outer longitudinal one. There are a higher concentration of...

intestinal wall from digestive enzymes. In the small intestine, villi are folds of the mucosa that increase the surface area of the intestine. The villi...

of the gastric mucosa Transverse folds of rectum in the anal canal Circular folds in the small intestine This disambiguation page lists biology articles...

gastrointestinal tract, excluding the mouth Upper Lower Wall Serosa / Adventitia Subserosa Muscular layer Submucosa Circular folds Mucosa Muscularis mucosa...

celiac artery and its branches A human stomach at autopsy showing the many folds (rugae) High-quality image of the stomach Wikimedia Commons has media related...

gastrointestinal tract, excluding the mouth Upper Lower Wall Serosa / Adventitia Subserosa Muscular layer Submucosa Circular folds Mucosa Muscularis mucosa...

During the contracted state of the stomach it is thrown into numerous folds or rugae, which, for the most part, have a longitudinal direction. They...

gastrointestinal tract, excluding the mouth Upper Lower Wall Serosa / Adventitia Subserosa Muscular layer Submucosa Circular folds Mucosa Muscularis mucosa...

outside. Different species have different combinations of longitudinal and circular muscles around it. In general, Hymenoptera contain sphincter muscles that...