1. Digestive System 3
Intestines

2. 12 4

3. #1 #7 #9 Small Intestines 1.) Small Intestines
help digest and absorb nutrients from our food #1 #7 #9

4. 1.)Small intestines: A. Duodenum B. Jejunum C. ileum

5. Small Intestine #1 duodenum - upper region; connected to stomach
1st to receive chyme
Receives enzymes from the liver and pancreas
Length= 26cm

6. 2.) Liver (#4 Common bile duct)
secretes acids that break down fat

7. 3.) Pancreas: (#12 Pancreatic duct)
secretes enzymes that break down proteins, lipids, and carbohydrates
secrete insulin to control sugar levels

8. #7 jejunum - middle region
Small Intestine
#7 jejunum - middle region
Length= 2.5m

9. connects to large intestine
#9 ileum - lower region
connects to large intestine
Small Intestine
Length= 3.5m

11. break down of food video

12. Small Intestine
villi– has finger-like projections which increase surface area for absorption

13. 4.) Large Intestines/Colon: absorb water and vitamins from food
(#2,3,6,8,10:)
4.) Large Intestines/Colon:
absorb water and vitamins from food 6
Length= 1.5 m 2 8 3 10
movement of the large intestines video
breaking down nutrients video

14. Rectum 5.) Rectum: (#11) Peristalsis occurs to push feces into anus
Contain stretch receptors that give you the desire to defecate
Rectum

15. 6.) Anus: (#5)– outside opening
Internal Anal Sphincter: under involuntary control
External Anal Sphincter: under voluntary control