Digestion.StAIR

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Digestion.StAIR

  1. 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. 2. During mechanical digestion foods are physically broken apart into smaller pieces NEXT
  3. 3. During chemical digestion chemicals produced by your body break large molecules into smaller ones that your body can use NEXT
  4. 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. 5. During mechanical digestion chemicals produced by your body break large molecules into smaller ones that your body can use
  6. 6. During mechanical digestion foods are physically broken apart into smaller pieces
  7. 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. 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. 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. 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. 11. Let’s 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. 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. 13. Mastication is also known as the chewing process. Mastication aids in mechanical digestion by the TEETH
  14. 14. Ingestion occurs when the food first enters the mouth
  15. 15. Click SO FAR to advance SO FAR …. • 2) TEETH • 1) MOUTH ▫ MASTICATION ▫ INGESTION ▫ MECHANICAL DIGESTION
  16. 16. • TWO FUNCTIONS SALIVARY GLANDS 1.  Moistens and lubricates food 2.  Adds enzymes to begin breaking down carbohydrates Click picture to advance
  17. 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. 18. • CHEMICAL SALIVARY DIGESTION GLANDS WHY? • An enzyme in saliva begins to break down the starches in your food Click picture to advance
  19. 19. FUNCTIONS: TONGUE • Pushes food around • Makes food into a ball to help you swallow Click picture to advance
  20. 20. The functions of the SALIVARY GLANDS is are: 1) Moisten and lubricate food 2) Add enzymes to begin breaking down carbohydrates
  21. 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. 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. 23. MOUTH: INGESTION TEETH: MASTICATION MECHANICAL DIGESTION SALIVARY GLANDS: CHEMICAL DIGESTION TONGUE: MAKES FOOD INTO A BALL DIGESTIVE PROCESS
  24. 24. WHERE DOES CHEMICAL DIGESTION OCCUR? A) MOUTH B) TEETH C) SALIVARY GLANDS D) TONGUE
  25. 25. A) MOUTH •  REMEMBER, the mouth begins the •  The mouth also starts digestive process by the digestion of ingesting food CARBOHYDRATES (INGESTION)
  26. 26. B) TEETH •  32 teeth tear, crush, •  MASTICATION: and grind food into ▫  Chewing process small pieces   Incisors, canines, premolars, and •  MECHANICAL molars DIGESTION: ▫  Food is physically being broken apart into smaller pieces
  27. 27. C) SALIVARY GLANDS NEXT
  28. 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. 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…….

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