DIGESTION

Asked by  | 1st Jun, 2009, 10:56: AM

Expert Answer:

Chewing in mouth breaks food to smaller pieces   →   Salivary amylase breaks starch down to maltose   →    Food bolus is swallowed    →     Passage of food from mouth to pharynx to oesophagus and then to stomach       →     Stomach muscles mix food with gastric juice, producing chyme   →    In stomach, pepsinogen is converted to pepsin, which digests proteins to  peptides    →     Pancreatic juice released into small intestine    →  Sodium bicarbonate, present in pancreatic juice, neutralizes the acidic material from the stomach    →    Pancreatic amylase digests starch to maltose  →      Trypsin and chymotrypsin digest proteins to peptides    →       Peptidases complete the digestion of peptides to amino acids    →   Maltase completes the digestion of maltose into glucose   →  Bile, from liver, emulsifies fats   →  Lipase digests fats to glycerol and fatty acids    →    Absorption of digested food by villi of small intestine   →      Absorption of water, sodium and other useful substances by large intestine   →     Elimination of undigested food from the body.  

Answered by  | 3rd Jun, 2009, 09:15: AM

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