Lesson 1: HumanDigestive SystemFoundation ScienceSC 22101
What is Digestion?
What is Digestion?Digestion is food traveling through your body.
Digestion is food traveling through your body.•Food starts in a form the body can’t use.•Food is broken down into smaller ...
Digestive Tract
Digestive TractDigestive tract is thepath the foodfollows.
Digestive TractDigestive tract is thepath the foodfollows.Path food follows in the digestive tract:1) Mouth No longer volu...
Digestive Tract: ThePath Food Follows
The Digestive Tract: The Mouth1) Mouth – food starts in the mouth and is broken down intopieces by teeth.-Saliva makes the...
The Digestive Tract: Esophagus
The Digestive Tract: Esophagus2) Esophagus – food goes from the mouth to the esophagus.Muscles in the esophagus help to mo...
The Digestive Tract: EsophagusEsophagus2) Esophagus – food goes from the mouth to the esophagus.Muscles in the esophagus h...
The Digestive Tract: Stomach
The Digestive Tract: Stomach3) Stomach – food is broken down more in the stomach bymore enzymes and stomach acid .
The Digestive Tract: Stomach3) Stomach – food is broken down more in the stomach bymore enzymes and stomach acid .
The Digestive Tract: StomachStomach3) Stomach – food is broken down more in the stomach bymore enzymes and stomach acid .
The Digestive Tract: Small Intestine4) Small Intestine – where most of the nutrients from your foodis absorbed . Your smal...
The Digestive Tract: Small IntestineSmall Intestine4) Small Intestine – where most of the nutrients from your foodis absor...
The Digestive Tract: Small IntestineSmall Intestine4) Small Intestine – where most of the nutrients from your foodis absor...
Inside the Small Intestine
Inside the Small IntestineThese are Small Intestine Villi
Inside the Small IntestineThese are Small Intestine Villi
VilliVilli create a lotof area so theycan absorbnutrients fromfood.Small intestine iswhere most ofthe nutrientsfrom your f...
Villi
The Digestive Tract: Large Intestine5) Large Intestine – absorbs water from the food. The largeintestine is about 1.5 mete...
The Digestive Tract: Large IntestineLarge Intestine5) Large Intestine – absorbs water from the food. The largeintestine is...
The Digestive Tract: Large IntestineLarge Intestine5) Large Intestine – absorbs water from the food. The largeintestine is...
The Digestive Tract: Rectum6) Rectum– Stores feces.Feces is made of the parts of food your body did not use.
The Digestive Tract: RectumRectum6) Rectum– Stores feces.Feces is made of the parts of food your body did not use.
The EntireDigestive Tract isabout 9 meters!It takes your bodyfrom 24 to 72hours to digestfood.
Review
ReviewVideo…
1) What do you think the things are in the background of this slide?2) Name two places in your body where food is broken d...
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Digestive Tract

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Digestive Tract

  1. 1. Lesson 1: HumanDigestive SystemFoundation ScienceSC 22101
  2. 2. What is Digestion?
  3. 3. What is Digestion?Digestion is food traveling through your body.
  4. 4. Digestion is food traveling through your body.•Food starts in a form the body can’t use.•Food is broken down into smaller moleculesyour body can use – that is digestion.What is Digestion?
  5. 5. Digestive Tract
  6. 6. Digestive TractDigestive tract is thepath the foodfollows.
  7. 7. Digestive TractDigestive tract is thepath the foodfollows.Path food follows in the digestive tract:1) Mouth No longer voluntary2) Esophagus3) Stomach4) Small Intestine5) Large Intestine6) Rectum
  8. 8. Digestive Tract: ThePath Food Follows
  9. 9. The Digestive Tract: The Mouth1) Mouth – food starts in the mouth and is broken down intopieces by teeth.-Saliva makes the food more slippery and easier to swallow.-Saliva in the mouth has enzymes that help to break food intosmaller pieces.Enzymes make chemical reactions go faster.The mouth is the LAST place you have control of the food.
  10. 10. The Digestive Tract: Esophagus
  11. 11. The Digestive Tract: Esophagus2) Esophagus – food goes from the mouth to the esophagus.Muscles in the esophagus help to move the food toward thestomach.
  12. 12. The Digestive Tract: EsophagusEsophagus2) Esophagus – food goes from the mouth to the esophagus.Muscles in the esophagus help to move the food toward thestomach.
  13. 13. The Digestive Tract: Stomach
  14. 14. The Digestive Tract: Stomach3) Stomach – food is broken down more in the stomach bymore enzymes and stomach acid .
  15. 15. The Digestive Tract: Stomach3) Stomach – food is broken down more in the stomach bymore enzymes and stomach acid .
  16. 16. The Digestive Tract: StomachStomach3) Stomach – food is broken down more in the stomach bymore enzymes and stomach acid .
  17. 17. The Digestive Tract: Small Intestine4) Small Intestine – where most of the nutrients from your foodis absorbed . Your small intestine is about 6 or 7 meters long!
  18. 18. The Digestive Tract: Small IntestineSmall Intestine4) Small Intestine – where most of the nutrients from your foodis absorbed . Your small intestine is about 6 or 7 meters long!
  19. 19. The Digestive Tract: Small IntestineSmall Intestine4) Small Intestine – where most of the nutrients from your foodis absorbed . Your small intestine is about 6 or 7 meters long!
  20. 20. Inside the Small Intestine
  21. 21. Inside the Small IntestineThese are Small Intestine Villi
  22. 22. Inside the Small IntestineThese are Small Intestine Villi
  23. 23. VilliVilli create a lotof area so theycan absorbnutrients fromfood.Small intestine iswhere most ofthe nutrientsfrom your foodis absorbed intoyour body.
  24. 24. Villi
  25. 25. The Digestive Tract: Large Intestine5) Large Intestine – absorbs water from the food. The largeintestine is about 1.5 meters long. The large intestine andcolon are the same thing.
  26. 26. The Digestive Tract: Large IntestineLarge Intestine5) Large Intestine – absorbs water from the food. The largeintestine is about 1.5 meters long. The large intestine andcolon are the same thing.
  27. 27. The Digestive Tract: Large IntestineLarge Intestine5) Large Intestine – absorbs water from the food. The largeintestine is about 1.5 meters long. The large intestine andcolon are the same thing.
  28. 28. The Digestive Tract: Rectum6) Rectum– Stores feces.Feces is made of the parts of food your body did not use.
  29. 29. The Digestive Tract: RectumRectum6) Rectum– Stores feces.Feces is made of the parts of food your body did not use.
  30. 30. The EntireDigestive Tract isabout 9 meters!It takes your bodyfrom 24 to 72hours to digestfood.
  31. 31. Review
  32. 32. ReviewVideo…
  33. 33. 1) What do you think the things are in the background of this slide?2) Name two places in your body where food is broken down into smaller parts.3) What does the large intestine do?4) Where does most of the nutrients for your body get absorbed from?5) What are the things that absorb nutrients in the small intestine called?6) Name 2 things you think saliva (spit) does to help digestion.7) Why does the small intestine need a lot of surface area?8) My mom used to always tell me to chew my food well before I went to play. Why do youthink she told me to do that?9) Name the 6 steps of the digestive tract in the right order. Try to do it without yournotes!!10) Your mouth has things called “salivary glands” in it. Can you guess what is the job of yoursalivary glands?11) Draw the entire DIGESTIVE TRACT in your notebook. Use a different color for each of thesix parts.12) Tell me what digestion is in your own words.13) Do you think the large intestine has villi in it? Why or why not?14) Watch the artistic animation by Fritz Kahn again:a) What part is missing from the digestive tract?b)What sprays the food as it enters the intestine?c)Why do you think the man waits before he releases food from thestomach?Questions

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