The digestive and absorptive functions of the small intestine are specialized. The stomach’s acidic chyme is sent to it. The exocrine pancreas and Brunner’s glands produce neutral pH, which is required for digestion.
There are three sections to the small intestine:
The duodenum is the stomach’s proximal section. Villi are long, narrow projections that protrude into the lumen. Brunner’s Glands are the sole submucosal glands in the gastrointestinal tract (together with the esophagus).
The jejunum is the middle section of the intestine. Villi are long, narrow projections that protrude into the lumen. There are no submucosal glands.
Ileum is the distal section of the large intestine. Villi are short, wide finger-like projections that protrude into the lumen and have blunt tips. There are no submucosal glands. Peyer’s Patches are lymphoid cell aggregations in the lamina propria.
There are three sections to the small intestine:
The duodenum is the stomach’s proximal section. Villi are long, narrow projections that protrude into the lumen. Brunner’s Glands are the sole submucosal glands in the gastrointestinal tract (together with the esophagus).
The jejunum is the middle section of the intestine. Villi are long, narrow projections that protrude into the lumen. There are no submucosal glands.
Ileum is the distal section of the large intestine. Villi are short, wide finger-like projections that protrude into the lumen and have blunt tips. There are no submucosal glands. Peyer’s Patches are lymphoid cell aggregations in the lamina propria.
Digestive System (2)