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Investigation 2.7
The Journey Continues |
Once the food goes down the esophagus, where is its next stop? Refer back to your original drawings and see if you can come up with a way. |
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Now talk to your group. Try to come up with the next organs of digestion through which food will pass. Make a quick draw of this on your whiteboard to show to the rest of the class. |
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With your group, think about the following questions. |
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1. What size is the stomach? Is it larger around or smaller around than the intestines? |
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2. What shape are the two organs? Think about what the job of each organ might be. This could help you determine their general shape. You do not have to be exact at this time. |
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3. How might the size and shape of an organ affect what size food could fit into it? Remember, when the food left the throat and went down the esophagus it was only broken down a little. It is still quite large, too large for the body to use. |
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4. Knowing the size and shape and how much food will fit inside should help you determine which organ comes first. Can you decide now? Can you support your choice? |
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5. What happens to the size of the food when it is in the stomach? |
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Remember back to the beginning of our discussion on digestion your teacher suggested that carbohydrates are broken down to smaller molecules of glucose by the digestive enzymes. |
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What happens to the food you ate for lunch when it mixes in the stomach with the enzyme? |
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Remember you discussed previously that the intestines come after the stomach and are much narrower than the stomach. How big can the food be that goes into the intestines? |
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