1. The Digestive System and Body Metabolism Chapter 14

2. Do Now  Myths of the Digestive System: Debunked!

3. Myth #1  Does eating turkey cause sleepiness?

4. Myth #1  Turkey does have tryptophan in it, which is a protein that is occasionally used as a sleep aid. However, to gain full affect on the body, turkey would need to be ingested on a completely empty stomach without ingesting other proteins

5. Myth #2  Chewing gum takes 7 years to pass through the digestive system

6. Myth #2  Gum passes through the digestive system on schedule. Gum is made up of fats, waxes and other substances that make it “undigestable” but that does not keep it in your stomach for 7 years

7. Myth #3  People that go swimming less than 1 hour after eating with get a cramp and drown

8. Myth #3  “Stiches” are caused by the blood supply to the diaphragm being shut off. To help digestion, blood is pumped to the stomach. However, during exercise blood is pumped to muscles. Without adequate blood supply to the stomach, stomach muscles lack oxygen and develop cramps

9. Homework  Complete quiz that is linked on the wikisite

10. What are organs of the Digestive System?  Mouth  Tongue  Salivary Gland  Stomach  Pancreas  Liver  Spleen  Gallbladder  Small Intestines  Large Intestines

11. Alimentary Canal (Nourish)  Digestive functions  What are they?  Ingest  Digest  Absorb  Defecate  Stretches from mouth to the end of the long intestines  How long is it?  Approx 30 feet

12. Accessory Digestive Organs  Help with breakdown  Teeth  Tongue  Digestive glands  Pancreas  Liver  Gallbladder

13. Mouth  Plays a vital, and underappreciated role in digestion  If your mouth does not properly chew food, what happens?  Helps breakdown food  Begins digestion  Digestive system actually starts working when you SEE food  Contains the tonsils

14. Tonsils

15.  What purpose do they serve?  Apart of the body’s defense system  Tonsils can be removed when they become infected too often

16. Passage of Food  After passing through the mouth, food passes into the pharynx  Food then passes through the esophagus (connects diaphragm to the stomach (about 10 inches)  Food then moves to the stomach

17. Stomach  The diameter and volume of the stomach varies depending on the amount of food it contains  Can hold up to 1 gallon of food  When it is empty, it collapses inward and folds into “rugae”  Main functions  “Storage tank”  Food break down  Minimal absorption

18. The Science of Competitive Eating  https://www.youtube.com/watch?v=Szgd71BoeA4 https://www.youtube.com/watch?v=Szgd71BoeA4

19. Unscramble!  Create the correct sequence of food particle movement through the digestive tract  Pharynx  Large Intestines  Rectum  Oral Cavity  Esophagus  Small Intestines  Stomach

20. Gallbladder  Located right below liver  Stores bile  Helps break down large fat molecules into smaller particles  Fat gets absorbed, the then the bile is also reabsorbed back into the liver

21. Large Intestines  Last major part of the digestive system  Function is to remove water from indigestible food, and then pass waste material from the body  Takes approx. 16 hours to finish digestion

22. Liver  Important in metabolism, glycogen storage and detoxification  Many vital functions  Secretes bile  Cannot live without a liver

23. Small Intestines  Digestion using enzymes  Main site of absorption of nutrients  Includes  Duodenum  Jejunum  Ileum  Don’t get punched in the jejunum…  https://www.youtube.com/watch?v=oHulRDk__ko https://www.youtube.com/watch?v=oHulRDk__ko

24. Homework  Answer questions 1-4 on pg. 509-510