Welcome to the module on the Digestive System. 

Things to note! 
1. What "digestion" means. 
2. The diference between the two types of digestion. 
3. The role of the teeth, tongue and stomach in digestion. 
4. The difference between mechanical and chemical digestion. 
5. Digestion involves breaking down large molecules into soluable ones. 
6. What happens to food when it is broken down. 
7. The role of enzymes in digestion.