1. DIGESTIVE SYSTEM http://eatwellgetwell.files.wordpress.com/2006/05/digestion_good2.jpg

2. FUNCTION * PHYSICAL & CHEMICAL BREAKDOWN OF FOOD FOR ABSORPTION.

3. ORGANIZATION/COMPONENTS 1.ALIMENTARY CANAL: MOUTH  PHARYNX  ESOPHAGUS  STOMACH  SM. INTESTINE  LG. INTESTINE 2. ACCESSORY ORGANS: TEETH & TONGUE, SALIVARY GLANDS, LIVER, GALLBLADDER, PANCREAS, APPENDIX

4. TYPES OF DIGESTION 1. MECHANICAL: CRUSHING OF FOOD BY TEETH AND PERISTALTIC CONTRACTIONS FROM STOMACH & SM. INTESTINE. 2. CHEMICAL: ENZYMES FROM SALIVA, STOMACH, PANCREAS, AND LIVER.

5. PATHWAY OF DIGESTION 1. MOUTH: BEGINS DIGESTION (CARBOHYDRATES) USING SALIVARY AMYLASE; TEETH TO CRUSH!

6. 2. PHARYNX: AUTONOMIC REFLEX FOR SWALLOWING

7. 3. ESOPHAGUS: PERISTALTIC WAVES TO MOVE FOOD

8. 4. STOMACH: HYDROCHLORIC ACID + ENZYMES PRODUCE SEMI-SOLID MIXTURE (“CHYME”).

9. (PEPTIC) ULCERS – OPEN SORES IN ESOPHAGUS, STOMACH, OR SM. INTESTINE. * MAIN CAUSE -- BACTERIA CALLED HELICOBACTER PYLORI (H. PYLORI)

10. 5. INTESTINES: A. ABSORPTION THRU GI TRACT WALL BY “VILLI.” B. MOST DIGESTION OCCURS IN SM. INTESTINE C. LARGE INTESTINE – REMOVES WATER FROM UNDIGESTED MATERIAL (“FECES”).

11. ACCESSORY ORGANS

12. LIVER 1.LOCATION: UPPER RT QUAD OF ABD. CAVITY. *LARGEST GLAND IN THE BODY! 2.SECRETES “BILE” – “EMULSIFIES” FAT & DETOXIFIES POISONOUS SUBSTANCES

13. PANCREAS 1.EXOCRINE – SECRETES PANCREATIC JUICE 2.ENDOCRINE – SECRETES HORMONES: GLUCAGON AND INSULIN

14. SUMMARY