1. The process by which the Digestive System breaks down food into molecules the body can use. There are two types of digestion: 1)Mehanical 2)Chemical NEXT

2. During mechanical digestion foods are physically broken apart into smaller pieces NEXT

3. During chemical digestion chemicals produced by your body break large molecules into smaller ones that your body can use NEXT

4. Because MECHANICAL digestion breaks down food into small pieces, CHEMICALS can digest the food faster Most of the chemicals involved in digestion are ENZYMES, substances that speed up chemical reactions

5. During mechanical digestion chemicals produced by your body break large molecules into smaller ones that your body can use

6. During mechanical digestion foods are physically broken apart into smaller pieces

7. Click picture to advance During CHEMICAL DIGESTION chemicals produced by your body break large molecules into smaller ones that your body can use

8. WHERE DOES DIGESTION BEGIN? MOUTH INGESTION happens here (TAKE IN FOOD) THE MOUTH begins the digestion of CARBOHYDRATES Carbohydrates (CHO)= nutrients made of carbon, hydrogen, and Click picture to advance oxygen

9. TEETH 32 teeth Tear, crush, and grind your food into small pieces MASTICATION: Chewing process by which food is mashed and Click picture to advance crushed by teeth

10. MECHANICAL DIGESTION TEETH TYPES OF TEETH: Incisors WHY? Cut food into bite sized pieces Foods are physically Canines being broken apart into Tear and slash food smaller pieces by teeth Premolars Crush and grind food Molars Crush and grind food

11. Lets Review. The process by which the digestive system breaks down A) Digestion food into B) Mastication molecules the C) Ingestion body can use is called?

12. There are two types: 1)Mechanical: Foods are physically broken apart into smaller pieces 2)Chemical: Chemicals produced by your body break large molecules into smaller ones that your body can use NEXT Click picture to advance Click on DIGESTION to see a video clip

13. Mastication is also known as the chewing process. Mastication aids in mechanical digestion by the TEETH

14. Ingestion occurs when the food first enters the mouth

15. Click SO FAR to advance SO FAR . 2) TEETH 1) MOUTH MASTICATION INGESTION MECHANICAL DIGESTION

16. TWO FUNCTIONS SALIVARY GLANDS 1. Moistens and lubricates food 2. Adds enzymes to begin breaking down carbohydrates Click picture to advance

17. SALIVA SALIVARY Contains enzymes that GLANDS start the digestion of carbohydrates-which are converted to glucose Moistens the bites of food into a slippery mass that can be easily Click picture to advance swallowed

18. CHEMICAL SALIVARY DIGESTION GLANDS WHY? An enzyme in saliva begins to break down the starches in your food Click picture to advance

19. FUNCTIONS: TONGUE Pushes food around Makes food into a ball to help you swallow Click picture to advance

20. The functions of the SALIVARY GLANDS is are: 1) Moisten and lubricate food 2)Add enzymes to begin breaking down carbohydrates

21. The functions of the SALIVARY GLANDS are: 1) Moisten and lubricate food 2) Add enzymes to begin breaking down carbohydrates Saliva 1) Contains enzymes that start the digestion of carbohydrates-which are converted to glucose 1) Moistens the bites of food into a slippery mass that can be easily swallowed Click picture to advance

22. Click REMEMBER to return to the True/False question The functions of the SALIVARY GLANDS are: 1) Moisten and lubricate food 2) Add enzymes to begin breaking down carbohydrates Saliva 1) Contains enzymes that start the digestion of carbohydrates-which are converted to glucose 1) Moistens the bites of food into a slippery mass that can be easily swallowed

23. MOUTH: INGESTION TEETH: MASTICATION MECHANICAL DIGESTION SALIVARY GLANDS: CHEMICAL DIGESTION TONGUE: MAKES FOOD INTO A BALL DIGESTIVE PROCESS

24. WHERE DOES CHEMICAL DIGESTION OCCUR? A) MOUTH B) TEETH C) SALIVARY GLANDS D) TONGUE

25. A) MOUTH REMEMBER, the mouth begins the The mouth also starts digestive process by the digestion of ingesting food CARBOHYDRATES (INGESTION)

26. B) TEETH 32 teeth MASTICATION: tear, crush, and grind Chewing process food into small pieces Incisors, canines, premolars, and MECHANICAL molars DIGESTION: Food is physically being broken apart into smaller pieces

27. C) SALIVARY GLANDS NEXT

28. D) TONGUE FUNCTIONS: CHEMICAL DIGESTION does not occur Pushes food around MECHANICAL Rolls food into a DIGESTION does not occur ball to help you swallow

29. DIGESTION is a PINBALL MACHINE PINBALL=FOOD Click on DIGESTION is a PINBALL MACHINE for more information on digestion Click on PINBALL=FOOD for an interactive diagram MOUTH: PINBALL BEGINS JOURNEY TEETH: PINBALL GOES THROUGH A CHOMPING MASTICATOR SALIVARY GLANDS: PINBALL GETS RAINED ON TONGUE: TRAP DOOR GRABBER Click picture toreturn to the ROLLS FOOD AND SENDS beginning IT ON ITS WAY DOWN THE ESOPHAGUS TO BE CONTINUED.