1. Lesson 30 Digestion
Subtitle

2. Activator What is the purpose of the digestive system?
How Long is your digestive system?
30 Feet
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3. Brain Break
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4. Brain Break
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5. Digestion
the process of breaking down food by mechanical and enzymatic action into substances that can be used by the body.
Two types of digestion
Mechanical
Chemical
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6. The Mouth Mechanical Teeth Incisors: Cut food into bit size pieces
Canines: Tear and slash food
Molars: crush and grind food
Chemical
Saliva: carries enzymes that help break down food
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7. Esophagus Muscular tube that connects the mouth to the stomach
Lined with a tick and slippery substance to help food go down
Food takes a 10 second trip
Contractions of smooth muscles push the food toward the stomach
Epiglottis: Flap that seals off your windpipe as you swallow
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8. The Stomach Temporarily stores food.
Partial digestion place here. The churning action of the stomach muscles breaks down the food.
The stomach releases acids and enzymes for the chemical breakdown of food.
The stomach releases food into the small intestine
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9. Classwork Complete Digestion Labeling Worksheet
Work independently for the first 5 minutes
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10. Activator https://www.youtube.com/watch?v=v3E1txcKPe8
Write down the steps to the digestion system
Compare your steps to the steps in the video
Where you missing anything?
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11. Small Intestine
primary role of the small intestine is the absorption of nutrients broken down by digestion.
absorb water and compact the stool
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12. Large Intestine Also referred to as the colon Water is absorbed here
Remaining waste material is stored as feces before being removed by defecation
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13. Rectum Chamber that begins at the end of the large intestine
Ends at the rectum
Anus is the opening at the far end of the digestive tract through which stool leaves the body.
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14. 1. Mouth 2. Esophagus 3. Stomach 4. Small Intestine 5. Large Intestine
Overview
1. Mouth
2. Esophagus
3. Stomach
4. Small Intestine
5. Large Intestine
6. Rectum
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15. Class Work Complete Digestion Reading Worksheet
Work independently for the first 1o minutes
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