Answer:
Diet includes three materials such as lipids, protein and carbohydrates. Lipids are chemically digested by bile.
Proteins are chemically digested by duodenum.
Carbohydrates are chemically digested by Amylase in the mouth.
Lipids are converted into fatty acid, proteins are converted into amino acid and carbohydrates are converted into glucose.
Vitamins absorption of digestion food across villi and micro villi takes place.