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Small intestine facts for kids

Kids Encyclopedia Facts
Small intestine
Blausen 0817 SmallIntestine Anatomy.png
Diagram showing the small intestine and surrounding structures
Latin Intestinum tenue
System Digestive system
Artery Superior mesenteric artery
Vein Hepatic portal vein
Nerve Celiac ganglia, vagus
Lymph Intestinal lymph trunk

The small intestine is between the stomach and the large intestine. In humans over 5 years old, a small intestine may be five to six meters long. It is where most of the digestion and absorption happens.

The small intestine has three regions – the duodenum, jejunum, and ileum.

  • The duodenum receives bile and juice from the pancreas. It is where most digestion takes place. Secretions neutralise the stomach acidity, and enzymes digest the food.
  • The jejenum: the products of digestion (sugars, amino acids, and fatty acids) are absorbed into the bloodstream here.
  • The ileum: absorbs vitamin B12 and bile salts and any products of digestion which were not absorbed by the jejunum.

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Small intestine Facts for Kids. Kiddle Encyclopedia.