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Digestive System Jeopardy 10 pts: Where does digestion start? Mouth BONUS 10 pts: Name 2 things in the mouth that help break down food Teeth, tongue, saliva 10 pts: What organ takes food from the mouth to the stomach? esophagus •Esophagus made of smooth muscle •Contractions called peristalsis move food down throat Bonus 10 pts: What is the flap called that covers the glottis? Epiglottis 10 pts: What organ comes after the esophagus in digestion? Stomach • Ring of muscle between esophagus and stomach allows food to pass through, called the esophageal sphincter Bonus 10 pts: Sometimes acid can go back up the esophagus, which causes this condition… Heart burn, or acid reflux 20 pts: What in the stomach helps digest food? Stomach acid Bonus 20 pts: What is the pH of stomach acid? About pH 1 (Battery acid is pH 0, and Cola is 2.5) 20 pts: Why doesn’t stomach acid eat through the lining of the stomach? Stomach secretes mucus to protect the lining of the stomach Bonus 20 pts: What occurs if the mucus of the stomach lining wears away? Stomach ulcer 20 pts: Besides stomach acid, how else is food digested in the stomach? Stomach also churns food using muscle contractions Bonus 20 pts: About how many hours does food spend in the stomach? About 2 – 4 hours 30 pts: What is the next digestive organ after the stomach? Small intestine Pyloric sphincter lets food from stomach to the small intestine Made of thick ring of muscle 30 pts: What is the main role of the small intestine? Absorbing nutrients Villi are small finger-like projections in the small intestine that absorb nutrients Food spends about 3-5 hrs in the small intestine 30 pts: Bile is the enzyme that is made by this organ, which aids in digestion. Liver 40 pts: In which organ is bile stored? Gallbladder 40 pts: Where is the gallbladder located? Underneath the liver – connects the liver to the small intestine 40 pts: What other organ, which is found near the stomach, secretes enzymes for digestion? Pancreas 50 pts: What is the main job of the large intestine? Absorbs water Between the small and large intestine is a small pouch In humans – the appendix (function unknown) In other mammals – the cecum (function to break down cellulose 50 pts: Where does undigested food go after leaving the large intestine? Rectum Undigested food can stay in the large intestine for 10 hours to several days 50 pts: Where does food go after leaving the rectum? Through the anus into the toilet Next 3 questions are open to all teams – each worth 20 pts 1. This condition occurs when the large intestine doesn’t absorb enough water Diarrhea 2. This condition occurs when too much water is absorbed Constipation 3. Approximately how long in meters is the digestive tract from beginning to end, for the average adult human? (Closest team wins) 9 meters Final Jeopardy – make your wager! Food is processed in 4 phases: ingestion, digestion, absorption, and elimination. Name one organ that is involved in EACH of these phases