1. 16-2 The Digestive Process Begins Parrot Book Pages 518-523

2. What are the three functions of the digestive system?

3. Functions of the Digestive System 1. Breaks down food into molecules the body can use 2. The molecules are absorbed in to the blood as nutrients and carried throughout the body 3. Wastes are eliminated from the body

4. Organs of the Digestive System

5. 2 Types of Digestion Digestion- process by which body breaks down food into small nutrient molecules

6. 2 Types of Digestion Mechanical Digestion Chemical Digestion Mouth Stomach Small Intestines StomachMouth

8. What happens in the mouth?

9. P 520 Digestion starts in the mouth BOTH: mechanical and chemical digestion occur in the mouth Mechanical digestion- chewing food using your teeth, saliva softens the food to make it easier to chew and swallow Chemical digestion- saliva breaks down starch into sugars Saliva is an enzyme called amylase

10. What happens in the mouth?

11. Esophagus

13. What happens in the esophagus?

14. P 521 Esophagus- Muscular tube that connects mouth to stomach After you swallow the food it travels to the stomach (in about 10 seconds) Describe peristalsis Try this- page 521 Why do you think the esophagus is lined with mucus? What does the epiglottis do? How does the epiglottis prevents food from entering your lungs?

15. Peristalsis Occurs in esophagus, stomach, small & large intestines

17. What happens in the esophagus?

18. What happens to food in the stomach? P 522 Do mechanical and/or chemical digestion occur in the stomach? What are digestive juices? What are enzymes? What is an ulcer?

19. Inside the Stomach page 523

20. The Stomach

22. What happens to food in the stomach?

23. Stomach Ulcer

24. Review