MBBS, PhD, MRCP, FRCP.
Gastro Specialist in Manchester.
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The main function of the small intestine is absorption of nutrients and minerals from food.
The small intestine can be divided into 3 major regions:
The duodenum is the first section of the intestine that connects to the pyloric sphincter of the stomach. It is the shortest region of the small intestine, measuring only about 10 inches in length. Partially digested food, or chyme, from the stomach is mixed with bile from the liver and pancreatic juice from the pancreas to complete its digestion in the duodenum.
The jejunum is the middle section of the small intestine that serves as the primary site of nutrient absorption. It measures around 3 feet in length.
The ileum is the final section of the small intestine that empties into the large intestine via the ileocecal sphincter. The ileum is about 6 feet long and completes the absorption of nutrients that were missed in the jejunum.
Peptic ulcer disease
Irritable bowel syndrome
Inflammatory Bowel Disease (IBD)
Intestinal Motility Disorders
Intestinal Radiation Injury
Intestinal Carcinoid Tumor
Intestinal Stromal Tumors