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THE DIGESTIVE SYSTEM MAIN FUNCTION: BREAKDOWN FOOD TO ABSORB NUTRIENTS FOR OUR CELLS. MAIN ORGANS AND STRUCTURES: MOUTH ESOPHAGUS STOMACH SMALL INTESTINE PANCREAS LARGE INTESTINE LIVER GALLBLADDER RECTUM MAIN FUNCTIONS OF THE ORGANS AND STRUCTURES: MOUTH: BEGINS BOTH CHEMICAL AND MECHANICAL DIGESTION; GLANDS IN MOUTH PRODUCE SALIVA, CONTAINS AMYLASE, WHICH HELP BREAKDOWN STARCH. ESOPHAGUS: CONNECTS THE THROAT TO THE STOMACH; THIS MUSCULAR TUBE MOVES FOOD DOWNWARD BY A SQUEEZING MOTION CALLED PERISTALSIS. STOMACH: A MUSCULAR BAG WHERE CHEMICAL AND MECHANICAL DIGESTION CONTINUES; FOOD STAYS HERE FOR ABOUT 4 HRS. AND IT IS CHANGE TO CHYME. SMALL INTESTINE: A TUBE NEARLY SEVEN METERS LONG WHERE DIGESTIVE JUICES FROM THE LIVER AND THE PANCREAS ARE ADDED, VILLY HERE ABSORBS MOLECULES FROM THE CHYME. PANCREAS: A SMALL ORGAN THAT PRODUCES SUBSTANCES THAT STOPS THE ACTION OF THE STOMACH ACID, CARBOHYDRATES, FATS AND PROTEINS. LARGE INTESTINE: ABSORBS WATER FROM UNDIGESTED FOOD; WHERE THE UNABSORBED MATERIALS BECOME MORE SOLID. LIVER: PRODUCES BILE, WHICH IS STORED IN THE GALLBLADDER, BILE PHYSICALLY BREAKS UP LARGE PARTICLES OF FAT INTO SMALLER PARTICLES. GALLBLADDER: A SMALL SAC THAT STORES BILE PRODUCED BY THE LIVER. RECTUM: WHERE MUSCLES CONTROL THE RELEASE OF WASTE FROM BODY.