Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Science Notes 5/28/2010 11:37:00 AM 19.2 Notes The Digestive System -What is it? The system that breaks down food so that it can be used by the body -Why is it important? Changes foods into nutrients Absorbs and transports nutrients Removes food waste from body -Digestive system failures Loss of teeth Scleroderma of the esophagus Stomach cancer Gallstones Pancreatic cancer Colon Cancer - Some fun facts Begins in mouth Ends in small intestine Enzymes in the digestion system Made up of digestive track VocabularyDigestion- Processing of food in the body Enzyme- Protein controlling biochemical reactions Mechanical Digestion- The actual physical break down of food into smaller pieces Chemical Digestion- The act or process of converting food into chemical substances that can be absorbed Saliva- The clear liquid secreted into the mouth by the salivary glands, consisting of water, mucin, protein, and enzymes Peristalis- a series of organized muscle contractions that occur throughout the digestive tract Chyme- that partially digested mass of food that is forced into the small intestine Villi- tiny, finger-like projections that come out from the wall of the small intestine Quiz Questions 1.Compare mechanical and chemical digestion. 2.Where does most digestion occur? 3.What product is made by bacteria in the large intestine? 4.What continues to force the remaining materials that have bean digested? 5/28/2010 11:37:00 AM 5/28/2010 11:37:00 AM