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SMALL INTESTINE Spaghetti time! SMALL INTESTINE •Roughly 20 feet •Small in diameter •Champion digester •Absorbs SMALL INTESTINE •Has 3 main parts. •1. Duodenum •2. Jejunum •3. Ileum Duodenum Section 1 Duodenum •First 10-12 inches after the stomach. •(Duodenal ulcers) Duodenum •Chyme- STUFF released from the stomach by the pyloric sphincter. •ACIDIC!! Duodenum •Bile •Comes from the liver to neutralize acid. •Emulsifies fat •Adds color to feces. Duodenum •Pancreatic Juice: •Comes from pancreas •Neutralizes acid •Releases 3 BIG enzymes Duodenum •Amylase: •Starch maltose Duodenum •Trypsin: •Proteins peptides Duodenum •Lipase: •Lipids Fatty acids & Glycerols Jejunum Section 2 Jejunum •About 8 feet long •BULK of nutrient absorption Jejunum •Intestinal juice: prepares food to be absorbed. Jejunum •Further breakdown •Peptidase: •Peptides amino acids Jejunum •Maltase: •Maltose Glucose Ileum •About 12 feet long •Connects to large intestine Color code •Color code the Villi •I,K,L,M