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Download Cellulose and the Alimentary Canal
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The Alimentary Canal and Cellulose By Aida Rogonich and Takara Reed [Didas & TK] Alimentary Canal/ Digestive Canal • Mouth • Pharynx • Esophagus • Stomach • Small & Large Intestines Mouth • Food is taken in • Grinded by teeth • Mixed with saliva – Comes from 3 large glands • Parotid • Submaxillary • Sublingual Pharynx • Food passes through the pharynx • Like a muscular membrane behind the nose and mouth which helps process food • Muscle contractions occur • Food is pushed down into/through the esophagus Stomach • After food passes through the esophagus by mucus and muscle contractions it enters the stomach – cardiac orfice • Strong gastric juices mix with the mucus and muscle contractions help fully digest and dissolve food – 2-4 hours Intestines • From stomach the food is further digested here and then goes through to the duodenum • Then fluids flow through the pancreatic duct – Urination • And solids flow through the bile duct – Wastes Miscellaneous • 30 feet long in humans • Imagine that you put one end of a hose in your mouth and kept threading it through until it came out of your butt. That's more or less what the alimentary canal is Reasons For Cellulose not being digested • Humans/ mammals don’t contain the symbiotic anaerobia bacteria needed to produce enzymes to breakdown the cellulose • Cellulose binds so strongly to each other. This makes cellulolysis relatively difficult compared to the breakdown of other polysaccharides • Cellulose main use is as dietary fiber or “roughage” Continued • We eat some plants and the cellulose we take in is used to clear up our intestine; push out wastes • It contains no essential proteins or such necessary, like other sugars • It’s bonds cannot be broken down by the fluids and muscle contractions part of the canal
