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Download The Digestive System - science
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The Digestive System Mouth • Mechanical digestion - teeth • Chemical digestion – saliva • 11 cm long Esophagus • Muscular tube • Peristalsis • About 25 cm long Stomach • • • • Strong muscles Digestive juices Chyme About 22 cm long Small Intestine • Most digestion occurs here • Molecules pass out through villi into blood • About 690 cm long Pancreas • Accessory organ • Food does not go through the pancreas • Produces chemicals to help break down macromolecules Liver • Accessory organ • Has many jobs • Produces bile to help digest fat Gall Bladder • Accessory organ • Stores bile • Helps digest fat Large Intestine (Colon) • Absorbs extra nutrients & water • Forms wastes into solid feces • About 152 cm long Rectum • Stores wastes • About 14 cm long Anus • Muscle that controls when wastes leaves the body
