Digestive System 3 Intestines

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

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

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

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

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

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

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

break down of food video

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

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

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

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