1. DIGESTION Breakdown of food into a form that cells can use

2. DIGESTIVE SYSTEM

3. PARTS OF THE DIGESTIVE SYSTEM Mouth Esophagus Stomach Small intestine Large intestine anus

4. FUNCTIONS THE MOUTH Grinds food Begins the physical change of food Begins the digestion of carbohydrates, by mixing the food with saliva

5. THE ESOPHOGUS Takes ground food to the stomach As it proceeds through it again is mixed with saliva where there is a physical change occurring

6. THE STOMACH Food arrives in the stomach mixed and continues to be mixed The stomach also secretes hydrochloric acid, also known as pepsin Digestion of proteins takes place in the stomach

7. THE SMALL INTESTINE The small intestine is about 30 feet long in humans The small intestine gets secretions from the liver and gall bladder which digest fat The pancreas secretions aid in the breakdown of protein fat and carbohydrates

8. CHEMICAL CHANGES A chemical change is the breakdown of food into a usable substance that the cells can use. Enzymes cause this breakdown to occur This change occurs when the food travels through the digestive system

9. ENZYMES Enzymes change the chemical composition of food These enzymes are produced in the following organs Water, vitamins and minerals move directly into the cells for use These do not have to be digested

10. ORGANS THAT PRODUCE ENZYMES Mouth produces saliva speeds the digestion of carbohydrates Stomach produces two chemicals one is an enzyme and one is hydrochloric acid Small intestine most chemical digestion takes place here

11. MORE PRODUCERS OF ENZYMES Pancreas produces enzymes that breakdown fats, protein, and carbohydrates Liver largest organ in body produces bile The bile is stored in the gallbladder Bile breaks down fat

12. SMALL INTESTINE Makes certain enzymes also 2.5 cm wide Food spends 12 hours in the small intestine

13. LARGE INTESTINE Tube-like organ at the end of the digestive system 5 cm wide Removes water Not much digestion takes place Water is returned to the bloodstream Food spends 5 hours in the large intestine

14. DIGESTIVE SYSTEM RECAP

15. Mouth digests carbohydrates Esophagus pushes food to stomach, takes less than one minute Stomach, food mixed with hydrochloric acid and pepsin,digests protein there for about 4 hours Small intestine gets enzymes from the pancreas, liver and gall bladder for the digestion of proteins, fats and carbohydrates Food spends about 12 hours here

16. Large intestine where water gets reabsorbed into the cells Food spends about 5 hours here Anus the end of the digestive system, solid waste leaves the body

17. AFTER THOUGHTS

18. The digestive system forms a tube that is about 900cm long

19. The average height of a adult is about 170cm Your digestive system is about 5 times longer than you’re your body.

20. Your Assignment

21. Choose 2 digestive system problems (to be handed out) Describe the physiology of the condition Prepare statistics and demographics of the disorder Research preventative dietary treatments Prepare a 3-5 paragraph report which will be presented to the class Report will be graded based on the rubric included