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Digestive System Digestive System Unit Review • • • • • • • • Be able to label all organs of the digestive system on a diagram Functions of the Digestive System (3) • Why is digestion necessary? Mechanical vs. Chemical Digestion • big pieces -> small pieces • enzymes Order of organs food passes through in the digestive tract (MESSLA) • Does mechanical/chemical/both/or no digestion occur in each? • Enzymes/chemicals present in each organ • What do each of the enzymes/chemicals break down? • Functions of each organ (digestion/absorption/elimination) • Importance of villi Where does digestion begin and end? Where does the most chemical digestion occur? Accessory Organs (Liver, gall bladder, pancreas) • What does each accessory organ do? • Where does it's product go? • Function of bile Review from previous units • What are the building blocks (products of digestion) of carbohydrates and proteins? • What is diffusion? • What is osmosis? ______________________________________________________________ _____________________ Digestive System Review Packet Answer Key ______________________________________________________________ _____________________ Digestive System Disorder Links KidsHealth Site page Disease KidsHealth Site page KidsHealth Site page Syndrome KidsHealth Site page Lactose Intolerance on Celiac Disease or Mayo Clinic Website page on Celiac on GERD or Mayo Clinic Website page on GERD on IBS or Mayo Clinic Website page on Irritable Bowel on Lactose Intolerance or Mayo Clinic Website page on ______________________________________________________________ _____________________ Digestive System Organ Function Digestive Organ Role in the Digestive System Mouth Mechanically breaks down food into smaller pieces; Chemically breaks down starch using enzymes Esophagus A muscular tube that connects the mouth to the stomach. Food moves down by peristalsis. Stomach Most mechanical digestion takes place here; muscular J-shaped pouch in the abdomen; chemical digestion of protein & carbs Small Intestine Most chemical digestion takes place Absorption of nutrients takes place here Large Intestine Water is reabsorbed into the body Waste is stored and eliminated from the body Appendix An extension of the large intestine that serves no known function. Liver The liver produces bile, which breaks down fat Gall Bladder Stores bile created by the liver Pancreas Produces enzymes that chemically break down food Enzymes secreted into the small intestine
