The small intestine is the longest part of the alimentary canal.
Its
proximal part is called duodenum. It is the site of further digestion of
carbohydrates, proteins and fats. It receives the secretion of liver and
pancreas for this purpose. These juices render the internal condition of the
intestine gradually to a basic or alkaline one.
Fats are digested by converting them into small globule like forms by the
help of the bile juice secreted from liver. This process is called emulsification.
Pancreatic juice secreted from pancreas contains enzymes like trypsin
for carrying on the process of digestion of proteins and lipase for fats.
Walls of the small intestine secrete intestinal juice called
succusentericus which carry this process further that is small molecules of
proteins are broken down to further smaller molecules. The same is the
condition with fats. Carbohydrate digestion that started in the mouth and did
not occur in the stomach, resumes now as the medium gradually changes to
an alkaline one and the enzymes become active for carbohydrate breakdown.
Studying the enzymes chart
Let us study the chart showing different enzymes and digestive juices
and their functions.