Discribe the alimentary canal of man
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Answer:
ALIMENTARY CANAL OF MAN
human digestive system involves various parts which performs different functions where in digestive juices with enzymes takes part
alimentary canal is a long tube extending from mouth to anus
process of taking food in the body is called ingestion
mastication of food takes place in mouth which leads to the formation of bolus
during mastication ptyalin present in saliva breaks down carbohydrate into maltose and dextrine
after mastication bolus passes through oesophagus by peristalsis and reaches stomach
stomach contains gastric glands which secretes gastric juice and hcl due to which protein gets partially digested by pepsin present in gastric juice
as a result of churning chyme is formed which reaches duodenum through pyloric sphincter
bile secreted by liver and pancreatic juice secreted by pancreas gets released into duodenum
emulsification of the fats is done by bile
lipase is pancreatic juice converts emulsified fats into fatty acids and glycerols while trypsin helps in partial digestion of proteins
peptidases is an intestinal juice converts peptides of proteins into amino acids
absorption of digested food takes place through villi present in walls of small intestine
undigested food moves into large intestine where water is absorbed
faeces are stored in rectum temporarily and are expelled out through anus which is also called egestion or defeacation
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ALIMENTARY CANAL, also called digestive tract, pathway by which food enters the body and soil wastes are expelled. it includes the mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus. ...
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