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Digestion.StAIR

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  • 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. 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. 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 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. 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…….