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Download 2014 Overall Digestion process
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BELLRINGER: Ingestion, propulsion, absorption, defecation, mechanical digestion, chemical digestion Transport nutrients from lumen to blood Enzymatic breakdown Elimination of feces Eating Chewing Segmentation and peristalsis Anatomy and Physiology Overall Digestion Bolus- soft, pliable ball created from chewing and addition of saliva. The Process: •In the mouth the saliva softens food so it can be swallowed. •Ptyalin in saliva converts starches into simple sugar •Then it moves down the esophagus into the stomach by peristalsis Process: In the stomach gastric juices are released and the stomach wall churns and mixes (chyme) Then small amounts move into the small intestine and digestion is completed and absorption occurs Process: Additional enzymes are added from the pancreas and bile from the liver/gallbladder Then it moves to the large intestine and large amounts of water is absorbed Then the rest of the undigested semi solid material (feces) is moved to the colon Process: Defecation occurs when a reflex is triggered. Entire process can take 75-80 hours Flatulence- gas formation, 1-3 pints/ day passes through rectum, 14 times a day, bacteria produces the gas Animation: http://www.youtube.com/watch?v=RAz44j LrpY0
