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Long time ago when I studied this but I think you are looking at physical and chemical. Physical digestion is masticulation, chewing, crushing, grinding etc and takes place in the mouth. Chemical digestion is the breakdown of foods by substances such as bile acids etc. This process also starts in the mouth as saliva contains some digestive acids, but in the main part takes place in the large intestine.

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13y ago

What else can I help you with?