SMALL INTESTINE Spaghetti time SMALL INTESTINE Roughly 20

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. (12 fingers) • (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

SMALL INTESTINE • Color the villi and label I, K, L, and M (Page 475)

Color code • Color code the Villi • I, K, L, M

SMALL INTESTINE • Villi: Fingerlike projections to increase surface area • X 600

VILLI •

SMALL INTESTINE • Crypts: Glands between villi that produce intestinal juices.

SMALL INTESTINE • Lacteal: Center of villi, where FAT products get absorbed.

SMALL INTESTINE • Arteries and Veins: Vessel network in each villi, ABSORB amino acids and glucose.

Veins and Arteries

Digestion & Absorbtion • 3 Big classes (4 with Nucleic acids) • 1. Carbohydrates • 2. Proteins • 3. Lipids

Carbohydrates • Start with Starch • STARCH Maltose AMYLASE

Carbohydrates • Maltose • Glucose Maltase

Carbohydrates • Glucose BLOOD

PROTEINS • Start with Protein • PROTEIN PEPTIDE Trypsin

Proteins PEPTIDE Amino Acids Peptidase BLOOD

LIPIDS FAT • Start with fat • FAT DROPLET BILE

LIPIDS F. Droplets LIPASE Fatty Acids Glycerols LACTEAL (Lymph System)