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
WHAT IS DIGESTION? Form Group 3C 12th January 2007 Digestion ? Digestive System? • Process of breaking down • An organ system, is large insoluble molecules made of a group of (e.g starch, proteins, fat) organs all working into smaller soluble together. molecules. • Each organ has a particular function and only by working together will they get the job done. What do you really know? Digestion Process 1. Mouth Salivary gland In the mouth the food is broken into small pieces and mixed with saliva. 2. Gullet or oesophagus oesophagus Part of the tube responsible for carry the food from the mouth to the stomach. 3. Stomach • Is a muscular bag that produces gastric juices. • It includes dilute hydrochloric acid and enzymes that we call proteases. 4. Gall Bladder or the bile Does not contain any enzymes but it breaks down the fats into very small droplets, giving a larger space to the fat enzymes called lipases can work in the small intestine. Bile is produced by the liver. 5. Pancreas The pancreas produces the pancreatic juice. 6. Small and Larger Intestine • Most food products are absorbed in the small intestine. Small intestine • The large intestine is responsible for absorption of water and excretion of solid waste material. Larger intestine rectum Digestion happens in 2 ways. Physical The shape of the food must be physically changed so that it can fit in the digestive system. Chemical This allows useful chemicals to be released and dissolve in the blood. To be broken down chemically, the bonds must be broken. Enzymes... Amylase Protease Lipase, Protease and Amylase. Class Notes... • Digestion involves breaking down large insoluble food molecules ( like starch, protein and fats) into smaller soluble molecules. • Find out what to write about the function of which organ in the digestive system... (mouth,gullet, stomach, bile, pancreas, smaller and larger intestine).