The Digestive System

1. Mr. Harper’s science mini lesson with audio TheDigestiveSystem What happens to the food we eat

2. Every part of our bodies is made up of billions of tiny living cells. Every cell needs food for energy or it will die. v v v

3. Cellsget the energy they need from sugar that comes to them in the blood. Blood in the capillary Bloodflow in capillary Sugar molecules Sugar molecules cell cell cell cell cell cell

4. The digestive system is a group of organs that process the food we eat and puts sugar into the blood that the cells need for energy to live. stomach Small intestine where sugar is put into the blood

5. The digestive process begins in the mouth. Food is broken into small pieces by the teeth and mixed with saliva (spit) which has chemicals that help with digestion.

6. Food is chewed up and mixed with saliva in the mouth. When we swallow, it moves down a tube called the esophagus. ee SOF uh gus

7. The esophagus delivers the food to the stomach, which is a storage bag. Here food is mixed with chemicals, acids and juices that help with digestion.

8. After it leaves the stomach the food material is very watery, like soup. It moves into the long, folded small intestine. Here is where the sugar and other nutrients are taken out of the food. stomach small intestine

9. The inside of the small intestine is lined with millions of tiny, finger-like projections called villi (vil eye). Villi absorb nutrients from our food. Villi is the plural for villus. 1 villus 2 villi

10. After the nutrients have been removed in the small intestine, the watery material moves into the large intestine, also called the colon. Stomach Small intestine Large intestine The large intestine is shorter but bigger around than the small intestine.

11. Most of the water is removed from the used-up food material in a healthy person’s large intestine. After that the solid waste (poop) goes into the toilet.

12. After it leaves the mouth, food passes through the digestive organs in this order:

13. Let’s review: After it leaves the mouth the order of the organs that food passes through is 1. Esophagus

14. Let’s review: After it leaves the mouth the order of the organs that food passes through is 1. Esophagus 2. Stomach

15. Let’s review: After it leaves the mouth the order of the organs that food passes through is 1. Esophagus 2. Stomach 3. Small intestine

16. Let’s review: After it leaves the mouth the order of the organs that food passes through is 1. Esophagus 2. Stomach 3. Small intestine 4. Large intestine also called the colon

17. ./ Now let’s check what you learned. ./

18. Review question 1 ./ What is the main function (job) of your digestive system?

19. Review question 1 ./ The job of our digestive system is get the sugar and nutrients our cells need to live from the food we eat. Short answer: The digestive system processes the food we eat.

20. Review question 2 ./ ./ What is the function of the esophagus?

21. Review question 2 ./ ./ The esophagus is atube that transports food from the mouth to the stomach. food

22. Review question 3 ./ ./ What is the job of the stomach?

23. Review question 3 ./ ./ The stomach is only a storage bag where food is mixed with acids to get it ready for digestion.

24. Review question 4 ./ ./ What happens in the small intestine?

25. Review question 4 ./ ./ The small intestine is where food is digested (sugar and other nutrients are removed from food and put into the blood).

26. Review question 5 ./ What happens to food material when it moves out of the small intestine? ./

27. Review question 5 ./ Food material is like a stinky brown soup when it leaves the small intestine. It goes next through the large intestine where most of the water is removed. ./

28. Review question 6 ./ Where does the digestive process begin? ./

29. Review question 6 ./ The digestive process begins in your mouth where food is broken up and mixed with saliva. ./

30. Review question 7 ./ What is the correct order of the digestive system organs that food passes through after it is swallowed? ./

31. Review question 7 ./ 1 • Esophagus • Stomach • Small intestine • Large intestine • (also called the • colon) 2 3 4 Large intestine

32. Review question 8 ./ ./ How does sugar travel from the small intestine to all the cells in your body?

33. Review question 8 The blood carries sugar from the small intestineto every cell in your body. Blood in the capillary Bloodflow in capillary Sugar molecules Sugar molecules cell cell cell cell cell cell

34. There is a good Brainpopcartoon that can teach you more: ./ • Digestive system