Carbohydrates
The breakdown of carbohydrates begins in the mouth with the help of the enzyme amylase, which is found in saliva. The breakdown continues in the stomach. As food passes through the duodenum, more amylase is released from the pancreas. The carbohydrates are completely broken down by the time they reach the small intestine, where they are absorbed into the bloodstream and transported to the liver.
Protein
With the help of enzymes found in gastric juice and pancreatic juice, proteins are broken down into various amino acids, which are then absorbed by the blood vessels in the intestine. The amino acids are transported to the liver to help build the body.
Fat
The fat in food is broken down in the intestine with the help of bile and is then digested by enzymes from the pancreas. The fat is absorbed by both the lymph and the blood and transported to the liver.
