THE HUMAN DIGESTIVE SYSTEM CONSISTS OF THE GASTROINTESTINAL TRACT PLUS THE ACCESSORY ORGANS OF DIGESTION (THE TONGUE, SALIVARY GLANDS, PANCREAS, LIVER, AND GALLBLADDER). [1] IN THIS SYSTEM, THE PROCESS OF DIGESTION HAS MANY STAGES, THE FIRST OF WHICH STARTS IN THE MOUTH. DIGESTION INVOLVES THE BREAKDOWN OF FOOD INTO SMALLER AND SMALLER COMPONENTS, UNTIL THEY CAN BE ABSORBED AND ASSIMILATED INTO THE BODY. CHEWING, IN WHICH FOOD IS MIXED WITH SALIVA BEGINS THE PROCESS OF DIGESTION. THIS PRODUCES A BOLUS WHICH CAN BE SWALLOWED DOWN THE ESOPHAGUS AND INTO THE STOMACH. HERE IT IS MIXED WITH GASTRIC JUICE UNTIL IT PASSES INTO THE DUODENUM, WHERE IT IS MIXED WITH A NUMBER OF ENZYMES PRODUCED BY THE PANCREAS. SALIVA ALSO CONTAINS A CATALYTIC ENZYME CALLED AMYLASE WHICH STARTS TO ACT ON FOOD IN THE MOUTH. ANOTHER DIGESTIVE ENZYME CALLED LINGUAL LIPASE IS SECRETED BY SOME OF THE LINGUAL PAPILLAE ON THE TONGUE AND ALSO FROM SEROUS GLANDS IN THE MAIN SALIVARY GLANDS. DIGESTION IS HELPED BY THE MASTICATION OF FOOD BY THE TEETH AND ALSO BY THE MUSCULAR ACTIONS OF PERISTALSIS AND SEGMENTATION CONTRACTIONS. GASTRIC JUICE IN THE STOMACH IS ESSENTIAL FOR THE CONTINUATION OF DIGESTION AS IS THE PRODUCTION OF MUCUS IN THE STOMACH. PERISTALSIS IS THE RHYTHMIC CONTRACTION OF MUSCLES THAT BEGINS IN THE ESOPHAGUS AND CONTINUES ALONG THE WALL OF THE STOMACH AND THE REST OF THE GASTROINTESTINAL TRACT. THIS INITIALLY RESULTS IN THE PRODUCTION OF CHYME WHICH WHEN FULLY BROKEN DOWN IN THE SMALL INTESTINE IS ABSORBED AS CHYLE INTO THE LYMPHATIC SYSTEM. MOST OF THE DIGESTION OF FOOD TAKES PLACE IN THE SMALL INTESTINE. WATER AND SOME MINERALS ARE REABSORBED BACK INTO THE BLOOD IN THE COLON OF THE LARGE INTESTINE. THE WASTE PRODUCTS OF DIGESTION (FAECES) ARE DEFECATED FROM THE ANUS VIA THE RECTUM. DIGESTIVE SYSTEM OF HUMAN/HUMAN DIGESTIVE SYSTEM PARTS AND FUNCTIONS https://youtu.be/Te6KJx5g1Ws INDIAN FUNNY VIDEOS – FUNNY VIDEOS WHATSAPP FUNNY VIDEOS 2017 OF MAY 17/WHATSAPP FUNNY VIDEO 2017 https://youtu.be/5wicSgq8Q1E HAND ART PAINTING/AMAZING HAND ART/ VIDEO FOR HAND ART PAINTING https://youtu.be/QAHYQ-lqZ8w COOL PLAYING CARD MAGIC TRICK / ILLUSION https://youtu.be/bZebdbMxPYo SUBWAY SURFERS GAMEPLAY HD/ SUBWAY SURFERS WORLD RECORD/ SUBWAY SURFERS HIGH SCORE https://youtu.be/kokr6fBk7TM CANDY CRUSH IN REAL LIFE https://youtu.be/VSYIWVXBiP4 TEMPLE RUN IN REAL LIFE / TEMPLE RUN 2 IN REAL LIFE https://youtu.be/r3n23hFEFgY RESPIRATION IN HUMANS/HUMAN RESPIRATORY SYSTEM PARTS AND FUNCTIONS https://youtu.be/ysKWZ5Nioj0 BLOOD CIRCULATORY SYSTEM IN HUMANS/ HUMAN HEART BLOOD CIRCULATION https://youtu.be/-L_t6sdEUa0 SUBWAY SURFERS IN REAL LIFE 2 https://youtu.be/MdjO3gurR4o LEGEND OF ZELDA IN REAL LIFE https://youtu.be/sbKEOEln18s WATER MARBLE NAIL ART TUTORIAL / ENCHANTED FOREST RED FLOWER FEATHER NAIL DESIGN MANICURE EASY https://youtu.be/_iheK9pL7Wo (MOTAPA KE LIYE) 10 EFFECTIVE EXERCISE FOR OBESITY ,SWAMI RAMDEV,BABA RAMDEV https://youtu.be/4sS7hplvlBQ SAND ART VIDEO / SAND FANTASY VIDEO https://youtu.be/IR-qGx0H8Hw SAND ART / SAND FANTASY https://youtu.be/PdWEkiVWaXM WWF BEST FIGHTING https://youtu.be/coBq5kJlwmI SUBWAY SURFER HIGHSCORE , WORLD RECORD ! HD/SUBWAY SURFERS GAMEPLAY PC https://youtu.be/zxg9f3CbcPA HOW CELL CYCLE WORKS/ CELL CYCLE AND MITOSIS/ ANIMATION HOW THE CELL CYCLE WORKS https://youtu.be/0niZRgDKSqQ MEIOSIS CELL DIVISION https://youtu.be/h8tkedsAMa8 SACHIN A BILLION DREAMS https://youtu.be/Q82w8gfpKNA FOLLOW US ON TWITTER https://twitter.com/d_svideos FOLLOW US ON F B https://www.facebook.com/dns.videos.73

DIGESTIVE SYSTEM OF HUMAN/HUMAN DIGESTIVE SYSTEM PARTS AND FUNCTIONS
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