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The Digestive SystemThe Digestive System
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Digestive System ChallengeDigestive System Challenge
• Take in complex foods.
• Mechanically break food down.
• Chemically break food down.
• Absorb food to power our bodies.
• Materials that cannot be absorbed are eliminated through the excretory system.
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Anatomy of DigestionAnatomy of Digestion
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Let’s start the journey!Let’s start the journey!
In the In the mouth!mouth!
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Salivary Glands:Salivary Glands:
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SwallowingSwallowing
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• warm.
• muscular.
• very acidic.
• lined with thousands of gastric glands.
• gastric juices contain HCL and pepsin.
• initial chemical breakdown of proteins.
• more mechanical breakdown.
The StomachThe Stomach
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The StomachThe Stomach
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The intestinal The intestinal tracttract
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HerniaHernia
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EsphagiEsphagialJunctialJuncti
onon
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DiverticulosisDiverticulosis
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QuestionsQuestions1. What are two methods we break down food?2. What happens to materials our bodies cannot break
down?3. What role does saliva play in digestion?4. What is a sphincter?5. What does the epiglotis do?6. Why doesn't the stomach get disgested itself with all
the acid in it?7. What is one cause of a Peptic ulcer?8. How is the surface area of the intestine increased ?