1. Try to Answer! Write your answer/best guess on your sheet.
1. How long are your intestines? 2. How long are the intestines of a full grown horse? 3. How long does chewing take? 4. How long does swallowing take? 5. Food sloshes in the stomach. How long can this last? 6. How long does it take for food to move through the intestine? 7. Food drying up and hanging out in the large intestine can last how long? 8. How many pounds of peanut butter do Americans eat in a year? 9. How many pounds of chocolate do Americans eat in a year? 10. In your lifetime, your digestive system may handle how many tons of food?

2. Answers! 1. How long are your intestines? 25 feet
2. How long are the intestines of a full grown horse? feet
3. How long does chewing take? seconds
4. How long does swallowing take? seconds
5. Food sloshes in the stomach. How long can this last? 3-4 hours
6. How long does it take for food to move through the intestine? 3 hours
7. Food drying up and hanging out in the large intestine can last how long? 18 hours to 2 days
8. How many pounds of peanut butter do Americans eat in a year? 700 million pounds
9. How many pounds of chocolate do Americans eat in a year? 2 billion pounds
10. In your lifetime, your digestive system may handle how many tons of food? 50 tons of food

3. The Digestive System

4. Parts of the Digestive System
Label your diagram as it is indicated on your sheet. DO NOT COLOR UNTIL YOU ARE DONE WITH THE REST OF YOUR SHEET!
Teeth/Mouth
Esophagus
Stomach
Small Intestine
Large Intestine
Pancreas
Liver
Gallbladder
Rectum

5. The Digestive System
Function: moves and breaks down food into smaller, usable nutrients.
Nutrients: the body needs to absorb different nutrients in order to function
Proteins
Carbohydrates
Fats
Water
Vitamins
Minerals

6. Types of Digestion
Chemical - Chemical changes actually change the food into different substances
Chewing a cracker – the cracker is broken into smaller pieces and the saliva in our mouth produces a chemical change – the starches in the cracker are changed to sugars
Mechanical - The physical process of breaking food into smaller pieces.
Chewing food, stomach mashing and pounding food during peristalsis.

7. Organs of the Digestive System
Read each slide carefully.
Write down the main function for each part of the digestive system.

8. Teeth grind and spit breaks up food
Mouth
Teeth grind and spit breaks up food
Salivary glands secrete 1-2 liters of spit a day

9. Moves food to stomach through peristalsis
Esophagus
Moves food to stomach through peristalsis
Peristalsis- the muscular action of material moving through the digestive system by wave-like action of smooth muscles.

10. Chemicals break down the food
Stomach
Chemicals break down the food
The stomach is lined with a thick mucus so the stomach acid does not eat away at itself.

11. Absorbs nutrients 22 feet long
Small Intestine
Absorbs nutrients 22 feet long
Villi (small structures in the small intestine) contain folds that absorb the nutrients.

12. Most of the solid material (poo) that remains is compacted and stored.
Large Intestine
Absorbs water
Most of the solid material (poo) that remains is compacted and stored.

13. Filters blood & produces bile
Liver
Filters blood & produces bile
Go Rattlers!
Bile is a chemical that helps break down food.

14. Produces insulin and glucagon
Pancreas
Produces insulin and glucagon
Without these chemicals from your pancreas your body would die of starvation.

15. Stores bile made by the liver; secretes bile to small intestine
Gallbladder
Stores bile made by the liver; secretes bile to small intestine

16. Stores feces (solid waste product)
Rectum
Stores feces (solid waste product)

17. THE
END

18. If you are finished with your writing…
Now color code the digestive system diagram.