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Transcript
THE DIGESTIVE SYSTEM
MAIN FUNCTION: BREAKDOWN FOOD TO ABSORB NUTRIENTS FOR OUR CELLS.
MAIN ORGANS AND STRUCTURES:
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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.