Processes that take place in the duodenum are:
(i) Bile emulsifies the fat molecules present in the food into small globules.
(ii) The pancreatic enzyme trypsin starts digesting the proteins and the pancreatic amylase breaks down the starch.
(iii) Bile juice secrered by the liver and bicarbonate ions are secreted by the duodenal wall which makes the medium alkaline.
