In biology, a lumen ( pl. : lumina) is the inside space of a tubular structure, such as an artery or intestine. It comes from Latin lumen 'an opening'.

The coiled tube of the small intestine is subdivided into three regions. From proximal (at the stomach) to distal, these are the duodenum, jejunum, and ileum.

The wall of the jejunum is thicker and its lumen is wider than in ileum; The jejunum contains more prominent circular folds of Kerckring. Ileum.

The epithelial cells of the villi transport nutrients from the lumen of the intestine into these capillaries (amino acids and carbohydrates) and lacteals ( ...

8 дек. 2017 г. · The ileum has a thinner wall and a smaller lumen than the jejunum and mainly occupies the central and right lower abdomen and pelvis. Mesenteric ...

Villi: The folds form numerous tiny projections which stick out into the open space inside your small intestine (or lumen), and are covered with cells that help ...

The lumen of the stomach is the area in which food and gastric juices reside. The lumen of the small bowel is transports the digestive material to the colon.

No distinct anatomic demarcation exists between jejunum and ileum. Visual examination of the luminal surface of the small intestine reveals mucosal folds, the ...