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1.undigested food is assimilated by the body
2.solid waste is excreted in the form of faeces through the anus
3.saliva is important for the digestion of proteins till the protein reaches the stomach
4. digestive system of human beings has certain bacteria that helps in the digestion of have a role in the synthesis of vitamins B and K and the metabolism of bile acids, other sterols and xenobiotics
5.breakdown of fats into fatty acids and glycerol is called mastication
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